diff --git a/src/pixi/InteractionManager.js b/src/pixi/InteractionManager.js
index bdbb276..e125dc8 100644
--- a/src/pixi/InteractionManager.js
+++ b/src/pixi/InteractionManager.js
@@ -53,7 +53,7 @@
 }
 
 // constructor
-PIXI.InteractionManager.constructor = PIXI.InteractionManager;
+PIXI.InteractionManager.prototype.constructor = PIXI.InteractionManager;
 
 /**
  * Collects an interactive sprite recursively to have their interactions managed
@@ -618,4 +618,4 @@
 }
 
 // constructor
-PIXI.InteractionData.constructor = PIXI.InteractionData;
+PIXI.InteractionData.prototype.constructor = PIXI.InteractionData;

diff --git a/src/pixi/InteractionManager.js b/src/pixi/InteractionManager.js
index bdbb276..e125dc8 100644
--- a/src/pixi/InteractionManager.js
+++ b/src/pixi/InteractionManager.js
@@ -53,7 +53,7 @@
 }
 
 // constructor
-PIXI.InteractionManager.constructor = PIXI.InteractionManager;
+PIXI.InteractionManager.prototype.constructor = PIXI.InteractionManager;
 
 /**
  * Collects an interactive sprite recursively to have their interactions managed
@@ -618,4 +618,4 @@
 }
 
 // constructor
-PIXI.InteractionData.constructor = PIXI.InteractionData;
+PIXI.InteractionData.prototype.constructor = PIXI.InteractionData;
diff --git a/src/pixi/core/Circle.js b/src/pixi/core/Circle.js
index 6c3433d..a9ceed0 100644
--- a/src/pixi/core/Circle.js
+++ b/src/pixi/core/Circle.js
@@ -69,5 +69,5 @@
     return (dx + dy <= r2);
 }
 
-PIXI.Circle.constructor = PIXI.Circle;
+PIXI.Circle.prototype.constructor = PIXI.Circle;
 

diff --git a/src/pixi/InteractionManager.js b/src/pixi/InteractionManager.js
index bdbb276..e125dc8 100644
--- a/src/pixi/InteractionManager.js
+++ b/src/pixi/InteractionManager.js
@@ -53,7 +53,7 @@
 }
 
 // constructor
-PIXI.InteractionManager.constructor = PIXI.InteractionManager;
+PIXI.InteractionManager.prototype.constructor = PIXI.InteractionManager;
 
 /**
  * Collects an interactive sprite recursively to have their interactions managed
@@ -618,4 +618,4 @@
 }
 
 // constructor
-PIXI.InteractionData.constructor = PIXI.InteractionData;
+PIXI.InteractionData.prototype.constructor = PIXI.InteractionData;
diff --git a/src/pixi/core/Circle.js b/src/pixi/core/Circle.js
index 6c3433d..a9ceed0 100644
--- a/src/pixi/core/Circle.js
+++ b/src/pixi/core/Circle.js
@@ -69,5 +69,5 @@
     return (dx + dy <= r2);
 }
 
-PIXI.Circle.constructor = PIXI.Circle;
+PIXI.Circle.prototype.constructor = PIXI.Circle;
 
diff --git a/src/pixi/core/Ellipse.js b/src/pixi/core/Ellipse.js
index a0703ad..dd369da 100644
--- a/src/pixi/core/Ellipse.js
+++ b/src/pixi/core/Ellipse.js
@@ -83,5 +83,5 @@
     return new PIXI.Rectangle(this.x, this.y, this.width, this.height);
 }
 
-PIXI.Ellipse.constructor = PIXI.Ellipse;
+PIXI.Ellipse.prototype.constructor = PIXI.Ellipse;
 

diff --git a/src/pixi/InteractionManager.js b/src/pixi/InteractionManager.js
index bdbb276..e125dc8 100644
--- a/src/pixi/InteractionManager.js
+++ b/src/pixi/InteractionManager.js
@@ -53,7 +53,7 @@
 }
 
 // constructor
-PIXI.InteractionManager.constructor = PIXI.InteractionManager;
+PIXI.InteractionManager.prototype.constructor = PIXI.InteractionManager;
 
 /**
  * Collects an interactive sprite recursively to have their interactions managed
@@ -618,4 +618,4 @@
 }
 
 // constructor
-PIXI.InteractionData.constructor = PIXI.InteractionData;
+PIXI.InteractionData.prototype.constructor = PIXI.InteractionData;
diff --git a/src/pixi/core/Circle.js b/src/pixi/core/Circle.js
index 6c3433d..a9ceed0 100644
--- a/src/pixi/core/Circle.js
+++ b/src/pixi/core/Circle.js
@@ -69,5 +69,5 @@
     return (dx + dy <= r2);
 }
 
-PIXI.Circle.constructor = PIXI.Circle;
+PIXI.Circle.prototype.constructor = PIXI.Circle;
 
diff --git a/src/pixi/core/Ellipse.js b/src/pixi/core/Ellipse.js
index a0703ad..dd369da 100644
--- a/src/pixi/core/Ellipse.js
+++ b/src/pixi/core/Ellipse.js
@@ -83,5 +83,5 @@
     return new PIXI.Rectangle(this.x, this.y, this.width, this.height);
 }
 
-PIXI.Ellipse.constructor = PIXI.Ellipse;
+PIXI.Ellipse.prototype.constructor = PIXI.Ellipse;
 
diff --git a/src/pixi/core/Point.js b/src/pixi/core/Point.js
index 294a8f8..8520861 100644
--- a/src/pixi/core/Point.js
+++ b/src/pixi/core/Point.js
@@ -39,5 +39,5 @@
 }
 
 // constructor
-PIXI.Point.constructor = PIXI.Point;
+PIXI.Point.prototype.constructor = PIXI.Point;
 

diff --git a/src/pixi/InteractionManager.js b/src/pixi/InteractionManager.js
index bdbb276..e125dc8 100644
--- a/src/pixi/InteractionManager.js
+++ b/src/pixi/InteractionManager.js
@@ -53,7 +53,7 @@
 }
 
 // constructor
-PIXI.InteractionManager.constructor = PIXI.InteractionManager;
+PIXI.InteractionManager.prototype.constructor = PIXI.InteractionManager;
 
 /**
  * Collects an interactive sprite recursively to have their interactions managed
@@ -618,4 +618,4 @@
 }
 
 // constructor
-PIXI.InteractionData.constructor = PIXI.InteractionData;
+PIXI.InteractionData.prototype.constructor = PIXI.InteractionData;
diff --git a/src/pixi/core/Circle.js b/src/pixi/core/Circle.js
index 6c3433d..a9ceed0 100644
--- a/src/pixi/core/Circle.js
+++ b/src/pixi/core/Circle.js
@@ -69,5 +69,5 @@
     return (dx + dy <= r2);
 }
 
-PIXI.Circle.constructor = PIXI.Circle;
+PIXI.Circle.prototype.constructor = PIXI.Circle;
 
diff --git a/src/pixi/core/Ellipse.js b/src/pixi/core/Ellipse.js
index a0703ad..dd369da 100644
--- a/src/pixi/core/Ellipse.js
+++ b/src/pixi/core/Ellipse.js
@@ -83,5 +83,5 @@
     return new PIXI.Rectangle(this.x, this.y, this.width, this.height);
 }
 
-PIXI.Ellipse.constructor = PIXI.Ellipse;
+PIXI.Ellipse.prototype.constructor = PIXI.Ellipse;
 
diff --git a/src/pixi/core/Point.js b/src/pixi/core/Point.js
index 294a8f8..8520861 100644
--- a/src/pixi/core/Point.js
+++ b/src/pixi/core/Point.js
@@ -39,5 +39,5 @@
 }
 
 // constructor
-PIXI.Point.constructor = PIXI.Point;
+PIXI.Point.prototype.constructor = PIXI.Point;
 
diff --git a/src/pixi/core/Polygon.js b/src/pixi/core/Polygon.js
index 5c1db06..47cf17b 100644
--- a/src/pixi/core/Polygon.js
+++ b/src/pixi/core/Polygon.js
@@ -73,5 +73,5 @@
     return inside;
 }
 
-PIXI.Polygon.constructor = PIXI.Polygon;
+PIXI.Polygon.prototype.constructor = PIXI.Polygon;
 

diff --git a/src/pixi/InteractionManager.js b/src/pixi/InteractionManager.js
index bdbb276..e125dc8 100644
--- a/src/pixi/InteractionManager.js
+++ b/src/pixi/InteractionManager.js
@@ -53,7 +53,7 @@
 }
 
 // constructor
-PIXI.InteractionManager.constructor = PIXI.InteractionManager;
+PIXI.InteractionManager.prototype.constructor = PIXI.InteractionManager;
 
 /**
  * Collects an interactive sprite recursively to have their interactions managed
@@ -618,4 +618,4 @@
 }
 
 // constructor
-PIXI.InteractionData.constructor = PIXI.InteractionData;
+PIXI.InteractionData.prototype.constructor = PIXI.InteractionData;
diff --git a/src/pixi/core/Circle.js b/src/pixi/core/Circle.js
index 6c3433d..a9ceed0 100644
--- a/src/pixi/core/Circle.js
+++ b/src/pixi/core/Circle.js
@@ -69,5 +69,5 @@
     return (dx + dy <= r2);
 }
 
-PIXI.Circle.constructor = PIXI.Circle;
+PIXI.Circle.prototype.constructor = PIXI.Circle;
 
diff --git a/src/pixi/core/Ellipse.js b/src/pixi/core/Ellipse.js
index a0703ad..dd369da 100644
--- a/src/pixi/core/Ellipse.js
+++ b/src/pixi/core/Ellipse.js
@@ -83,5 +83,5 @@
     return new PIXI.Rectangle(this.x, this.y, this.width, this.height);
 }
 
-PIXI.Ellipse.constructor = PIXI.Ellipse;
+PIXI.Ellipse.prototype.constructor = PIXI.Ellipse;
 
diff --git a/src/pixi/core/Point.js b/src/pixi/core/Point.js
index 294a8f8..8520861 100644
--- a/src/pixi/core/Point.js
+++ b/src/pixi/core/Point.js
@@ -39,5 +39,5 @@
 }
 
 // constructor
-PIXI.Point.constructor = PIXI.Point;
+PIXI.Point.prototype.constructor = PIXI.Point;
 
diff --git a/src/pixi/core/Polygon.js b/src/pixi/core/Polygon.js
index 5c1db06..47cf17b 100644
--- a/src/pixi/core/Polygon.js
+++ b/src/pixi/core/Polygon.js
@@ -73,5 +73,5 @@
     return inside;
 }
 
-PIXI.Polygon.constructor = PIXI.Polygon;
+PIXI.Polygon.prototype.constructor = PIXI.Polygon;
 
diff --git a/src/pixi/core/Rectangle.js b/src/pixi/core/Rectangle.js
index 64acf7a..66fb5d6 100644
--- a/src/pixi/core/Rectangle.js
+++ b/src/pixi/core/Rectangle.js
@@ -82,5 +82,5 @@
 }
 
 // constructor
-PIXI.Rectangle.constructor = PIXI.Rectangle;
+PIXI.Rectangle.prototype.constructor = PIXI.Rectangle;
 

diff --git a/src/pixi/InteractionManager.js b/src/pixi/InteractionManager.js
index bdbb276..e125dc8 100644
--- a/src/pixi/InteractionManager.js
+++ b/src/pixi/InteractionManager.js
@@ -53,7 +53,7 @@
 }
 
 // constructor
-PIXI.InteractionManager.constructor = PIXI.InteractionManager;
+PIXI.InteractionManager.prototype.constructor = PIXI.InteractionManager;
 
 /**
  * Collects an interactive sprite recursively to have their interactions managed
@@ -618,4 +618,4 @@
 }
 
 // constructor
-PIXI.InteractionData.constructor = PIXI.InteractionData;
+PIXI.InteractionData.prototype.constructor = PIXI.InteractionData;
diff --git a/src/pixi/core/Circle.js b/src/pixi/core/Circle.js
index 6c3433d..a9ceed0 100644
--- a/src/pixi/core/Circle.js
+++ b/src/pixi/core/Circle.js
@@ -69,5 +69,5 @@
     return (dx + dy <= r2);
 }
 
-PIXI.Circle.constructor = PIXI.Circle;
+PIXI.Circle.prototype.constructor = PIXI.Circle;
 
diff --git a/src/pixi/core/Ellipse.js b/src/pixi/core/Ellipse.js
index a0703ad..dd369da 100644
--- a/src/pixi/core/Ellipse.js
+++ b/src/pixi/core/Ellipse.js
@@ -83,5 +83,5 @@
     return new PIXI.Rectangle(this.x, this.y, this.width, this.height);
 }
 
-PIXI.Ellipse.constructor = PIXI.Ellipse;
+PIXI.Ellipse.prototype.constructor = PIXI.Ellipse;
 
diff --git a/src/pixi/core/Point.js b/src/pixi/core/Point.js
index 294a8f8..8520861 100644
--- a/src/pixi/core/Point.js
+++ b/src/pixi/core/Point.js
@@ -39,5 +39,5 @@
 }
 
 // constructor
-PIXI.Point.constructor = PIXI.Point;
+PIXI.Point.prototype.constructor = PIXI.Point;
 
diff --git a/src/pixi/core/Polygon.js b/src/pixi/core/Polygon.js
index 5c1db06..47cf17b 100644
--- a/src/pixi/core/Polygon.js
+++ b/src/pixi/core/Polygon.js
@@ -73,5 +73,5 @@
     return inside;
 }
 
-PIXI.Polygon.constructor = PIXI.Polygon;
+PIXI.Polygon.prototype.constructor = PIXI.Polygon;
 
diff --git a/src/pixi/core/Rectangle.js b/src/pixi/core/Rectangle.js
index 64acf7a..66fb5d6 100644
--- a/src/pixi/core/Rectangle.js
+++ b/src/pixi/core/Rectangle.js
@@ -82,5 +82,5 @@
 }
 
 // constructor
-PIXI.Rectangle.constructor = PIXI.Rectangle;
+PIXI.Rectangle.prototype.constructor = PIXI.Rectangle;
 
diff --git a/src/pixi/display/DisplayObject.js b/src/pixi/display/DisplayObject.js
index 3b51aaf..f8ee024 100644
--- a/src/pixi/display/DisplayObject.js
+++ b/src/pixi/display/DisplayObject.js
@@ -258,7 +258,7 @@
 }
 
 // constructor
-PIXI.DisplayObject.constructor = PIXI.DisplayObject;
+PIXI.DisplayObject.prototype.constructor = PIXI.DisplayObject;
 
 //TODO make visible a getter setter
 /*

diff --git a/src/pixi/InteractionManager.js b/src/pixi/InteractionManager.js
index bdbb276..e125dc8 100644
--- a/src/pixi/InteractionManager.js
+++ b/src/pixi/InteractionManager.js
@@ -53,7 +53,7 @@
 }
 
 // constructor
-PIXI.InteractionManager.constructor = PIXI.InteractionManager;
+PIXI.InteractionManager.prototype.constructor = PIXI.InteractionManager;
 
 /**
  * Collects an interactive sprite recursively to have their interactions managed
@@ -618,4 +618,4 @@
 }
 
 // constructor
-PIXI.InteractionData.constructor = PIXI.InteractionData;
+PIXI.InteractionData.prototype.constructor = PIXI.InteractionData;
diff --git a/src/pixi/core/Circle.js b/src/pixi/core/Circle.js
index 6c3433d..a9ceed0 100644
--- a/src/pixi/core/Circle.js
+++ b/src/pixi/core/Circle.js
@@ -69,5 +69,5 @@
     return (dx + dy <= r2);
 }
 
-PIXI.Circle.constructor = PIXI.Circle;
+PIXI.Circle.prototype.constructor = PIXI.Circle;
 
diff --git a/src/pixi/core/Ellipse.js b/src/pixi/core/Ellipse.js
index a0703ad..dd369da 100644
--- a/src/pixi/core/Ellipse.js
+++ b/src/pixi/core/Ellipse.js
@@ -83,5 +83,5 @@
     return new PIXI.Rectangle(this.x, this.y, this.width, this.height);
 }
 
-PIXI.Ellipse.constructor = PIXI.Ellipse;
+PIXI.Ellipse.prototype.constructor = PIXI.Ellipse;
 
diff --git a/src/pixi/core/Point.js b/src/pixi/core/Point.js
index 294a8f8..8520861 100644
--- a/src/pixi/core/Point.js
+++ b/src/pixi/core/Point.js
@@ -39,5 +39,5 @@
 }
 
 // constructor
-PIXI.Point.constructor = PIXI.Point;
+PIXI.Point.prototype.constructor = PIXI.Point;
 
diff --git a/src/pixi/core/Polygon.js b/src/pixi/core/Polygon.js
index 5c1db06..47cf17b 100644
--- a/src/pixi/core/Polygon.js
+++ b/src/pixi/core/Polygon.js
@@ -73,5 +73,5 @@
     return inside;
 }
 
-PIXI.Polygon.constructor = PIXI.Polygon;
+PIXI.Polygon.prototype.constructor = PIXI.Polygon;
 
diff --git a/src/pixi/core/Rectangle.js b/src/pixi/core/Rectangle.js
index 64acf7a..66fb5d6 100644
--- a/src/pixi/core/Rectangle.js
+++ b/src/pixi/core/Rectangle.js
@@ -82,5 +82,5 @@
 }
 
 // constructor
-PIXI.Rectangle.constructor = PIXI.Rectangle;
+PIXI.Rectangle.prototype.constructor = PIXI.Rectangle;
 
diff --git a/src/pixi/display/DisplayObject.js b/src/pixi/display/DisplayObject.js
index 3b51aaf..f8ee024 100644
--- a/src/pixi/display/DisplayObject.js
+++ b/src/pixi/display/DisplayObject.js
@@ -258,7 +258,7 @@
 }
 
 // constructor
-PIXI.DisplayObject.constructor = PIXI.DisplayObject;
+PIXI.DisplayObject.prototype.constructor = PIXI.DisplayObject;
 
 //TODO make visible a getter setter
 /*
diff --git a/src/pixi/display/DisplayObjectContainer.js b/src/pixi/display/DisplayObjectContainer.js
index 4a3a204..649169f 100644
--- a/src/pixi/display/DisplayObjectContainer.js
+++ b/src/pixi/display/DisplayObjectContainer.js
@@ -26,8 +26,8 @@
 }
 
 // constructor
-PIXI.DisplayObjectContainer.constructor = PIXI.DisplayObjectContainer;
 PIXI.DisplayObjectContainer.prototype = Object.create( PIXI.DisplayObject.prototype );
+PIXI.DisplayObjectContainer.prototype.constructor = PIXI.DisplayObjectContainer;
 
 //TODO make visible a getter setter
 /*

diff --git a/src/pixi/InteractionManager.js b/src/pixi/InteractionManager.js
index bdbb276..e125dc8 100644
--- a/src/pixi/InteractionManager.js
+++ b/src/pixi/InteractionManager.js
@@ -53,7 +53,7 @@
 }
 
 // constructor
-PIXI.InteractionManager.constructor = PIXI.InteractionManager;
+PIXI.InteractionManager.prototype.constructor = PIXI.InteractionManager;
 
 /**
  * Collects an interactive sprite recursively to have their interactions managed
@@ -618,4 +618,4 @@
 }
 
 // constructor
-PIXI.InteractionData.constructor = PIXI.InteractionData;
+PIXI.InteractionData.prototype.constructor = PIXI.InteractionData;
diff --git a/src/pixi/core/Circle.js b/src/pixi/core/Circle.js
index 6c3433d..a9ceed0 100644
--- a/src/pixi/core/Circle.js
+++ b/src/pixi/core/Circle.js
@@ -69,5 +69,5 @@
     return (dx + dy <= r2);
 }
 
-PIXI.Circle.constructor = PIXI.Circle;
+PIXI.Circle.prototype.constructor = PIXI.Circle;
 
diff --git a/src/pixi/core/Ellipse.js b/src/pixi/core/Ellipse.js
index a0703ad..dd369da 100644
--- a/src/pixi/core/Ellipse.js
+++ b/src/pixi/core/Ellipse.js
@@ -83,5 +83,5 @@
     return new PIXI.Rectangle(this.x, this.y, this.width, this.height);
 }
 
-PIXI.Ellipse.constructor = PIXI.Ellipse;
+PIXI.Ellipse.prototype.constructor = PIXI.Ellipse;
 
diff --git a/src/pixi/core/Point.js b/src/pixi/core/Point.js
index 294a8f8..8520861 100644
--- a/src/pixi/core/Point.js
+++ b/src/pixi/core/Point.js
@@ -39,5 +39,5 @@
 }
 
 // constructor
-PIXI.Point.constructor = PIXI.Point;
+PIXI.Point.prototype.constructor = PIXI.Point;
 
diff --git a/src/pixi/core/Polygon.js b/src/pixi/core/Polygon.js
index 5c1db06..47cf17b 100644
--- a/src/pixi/core/Polygon.js
+++ b/src/pixi/core/Polygon.js
@@ -73,5 +73,5 @@
     return inside;
 }
 
-PIXI.Polygon.constructor = PIXI.Polygon;
+PIXI.Polygon.prototype.constructor = PIXI.Polygon;
 
diff --git a/src/pixi/core/Rectangle.js b/src/pixi/core/Rectangle.js
index 64acf7a..66fb5d6 100644
--- a/src/pixi/core/Rectangle.js
+++ b/src/pixi/core/Rectangle.js
@@ -82,5 +82,5 @@
 }
 
 // constructor
-PIXI.Rectangle.constructor = PIXI.Rectangle;
+PIXI.Rectangle.prototype.constructor = PIXI.Rectangle;
 
diff --git a/src/pixi/display/DisplayObject.js b/src/pixi/display/DisplayObject.js
index 3b51aaf..f8ee024 100644
--- a/src/pixi/display/DisplayObject.js
+++ b/src/pixi/display/DisplayObject.js
@@ -258,7 +258,7 @@
 }
 
 // constructor
-PIXI.DisplayObject.constructor = PIXI.DisplayObject;
+PIXI.DisplayObject.prototype.constructor = PIXI.DisplayObject;
 
 //TODO make visible a getter setter
 /*
diff --git a/src/pixi/display/DisplayObjectContainer.js b/src/pixi/display/DisplayObjectContainer.js
index 4a3a204..649169f 100644
--- a/src/pixi/display/DisplayObjectContainer.js
+++ b/src/pixi/display/DisplayObjectContainer.js
@@ -26,8 +26,8 @@
 }
 
 // constructor
-PIXI.DisplayObjectContainer.constructor = PIXI.DisplayObjectContainer;
 PIXI.DisplayObjectContainer.prototype = Object.create( PIXI.DisplayObject.prototype );
+PIXI.DisplayObjectContainer.prototype.constructor = PIXI.DisplayObjectContainer;
 
 //TODO make visible a getter setter
 /*
diff --git a/src/pixi/display/MovieClip.js b/src/pixi/display/MovieClip.js
index b435ffe..7a77856 100644
--- a/src/pixi/display/MovieClip.js
+++ b/src/pixi/display/MovieClip.js
@@ -69,8 +69,8 @@
 }
 
 // constructor
-PIXI.MovieClip.constructor = PIXI.MovieClip;
 PIXI.MovieClip.prototype = Object.create( PIXI.Sprite.prototype );
+PIXI.MovieClip.prototype.constructor = PIXI.MovieClip;
 
 /**
  * Stops the MovieClip

diff --git a/src/pixi/InteractionManager.js b/src/pixi/InteractionManager.js
index bdbb276..e125dc8 100644
--- a/src/pixi/InteractionManager.js
+++ b/src/pixi/InteractionManager.js
@@ -53,7 +53,7 @@
 }
 
 // constructor
-PIXI.InteractionManager.constructor = PIXI.InteractionManager;
+PIXI.InteractionManager.prototype.constructor = PIXI.InteractionManager;
 
 /**
  * Collects an interactive sprite recursively to have their interactions managed
@@ -618,4 +618,4 @@
 }
 
 // constructor
-PIXI.InteractionData.constructor = PIXI.InteractionData;
+PIXI.InteractionData.prototype.constructor = PIXI.InteractionData;
diff --git a/src/pixi/core/Circle.js b/src/pixi/core/Circle.js
index 6c3433d..a9ceed0 100644
--- a/src/pixi/core/Circle.js
+++ b/src/pixi/core/Circle.js
@@ -69,5 +69,5 @@
     return (dx + dy <= r2);
 }
 
-PIXI.Circle.constructor = PIXI.Circle;
+PIXI.Circle.prototype.constructor = PIXI.Circle;
 
diff --git a/src/pixi/core/Ellipse.js b/src/pixi/core/Ellipse.js
index a0703ad..dd369da 100644
--- a/src/pixi/core/Ellipse.js
+++ b/src/pixi/core/Ellipse.js
@@ -83,5 +83,5 @@
     return new PIXI.Rectangle(this.x, this.y, this.width, this.height);
 }
 
-PIXI.Ellipse.constructor = PIXI.Ellipse;
+PIXI.Ellipse.prototype.constructor = PIXI.Ellipse;
 
diff --git a/src/pixi/core/Point.js b/src/pixi/core/Point.js
index 294a8f8..8520861 100644
--- a/src/pixi/core/Point.js
+++ b/src/pixi/core/Point.js
@@ -39,5 +39,5 @@
 }
 
 // constructor
-PIXI.Point.constructor = PIXI.Point;
+PIXI.Point.prototype.constructor = PIXI.Point;
 
diff --git a/src/pixi/core/Polygon.js b/src/pixi/core/Polygon.js
index 5c1db06..47cf17b 100644
--- a/src/pixi/core/Polygon.js
+++ b/src/pixi/core/Polygon.js
@@ -73,5 +73,5 @@
     return inside;
 }
 
-PIXI.Polygon.constructor = PIXI.Polygon;
+PIXI.Polygon.prototype.constructor = PIXI.Polygon;
 
diff --git a/src/pixi/core/Rectangle.js b/src/pixi/core/Rectangle.js
index 64acf7a..66fb5d6 100644
--- a/src/pixi/core/Rectangle.js
+++ b/src/pixi/core/Rectangle.js
@@ -82,5 +82,5 @@
 }
 
 // constructor
-PIXI.Rectangle.constructor = PIXI.Rectangle;
+PIXI.Rectangle.prototype.constructor = PIXI.Rectangle;
 
diff --git a/src/pixi/display/DisplayObject.js b/src/pixi/display/DisplayObject.js
index 3b51aaf..f8ee024 100644
--- a/src/pixi/display/DisplayObject.js
+++ b/src/pixi/display/DisplayObject.js
@@ -258,7 +258,7 @@
 }
 
 // constructor
-PIXI.DisplayObject.constructor = PIXI.DisplayObject;
+PIXI.DisplayObject.prototype.constructor = PIXI.DisplayObject;
 
 //TODO make visible a getter setter
 /*
diff --git a/src/pixi/display/DisplayObjectContainer.js b/src/pixi/display/DisplayObjectContainer.js
index 4a3a204..649169f 100644
--- a/src/pixi/display/DisplayObjectContainer.js
+++ b/src/pixi/display/DisplayObjectContainer.js
@@ -26,8 +26,8 @@
 }
 
 // constructor
-PIXI.DisplayObjectContainer.constructor = PIXI.DisplayObjectContainer;
 PIXI.DisplayObjectContainer.prototype = Object.create( PIXI.DisplayObject.prototype );
+PIXI.DisplayObjectContainer.prototype.constructor = PIXI.DisplayObjectContainer;
 
 //TODO make visible a getter setter
 /*
diff --git a/src/pixi/display/MovieClip.js b/src/pixi/display/MovieClip.js
index b435ffe..7a77856 100644
--- a/src/pixi/display/MovieClip.js
+++ b/src/pixi/display/MovieClip.js
@@ -69,8 +69,8 @@
 }
 
 // constructor
-PIXI.MovieClip.constructor = PIXI.MovieClip;
 PIXI.MovieClip.prototype = Object.create( PIXI.Sprite.prototype );
+PIXI.MovieClip.prototype.constructor = PIXI.MovieClip;
 
 /**
  * Stops the MovieClip
diff --git a/src/pixi/display/Sprite.js b/src/pixi/display/Sprite.js
index 945331a..0713205 100644
--- a/src/pixi/display/Sprite.js
+++ b/src/pixi/display/Sprite.js
@@ -80,8 +80,8 @@
 }
 
 // constructor
-PIXI.Sprite.constructor = PIXI.Sprite;
 PIXI.Sprite.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Sprite.prototype.constructor = PIXI.Sprite;
 
 /**
  * The width of the sprite, setting this will actually modify the scale to acheive the value set

diff --git a/src/pixi/InteractionManager.js b/src/pixi/InteractionManager.js
index bdbb276..e125dc8 100644
--- a/src/pixi/InteractionManager.js
+++ b/src/pixi/InteractionManager.js
@@ -53,7 +53,7 @@
 }
 
 // constructor
-PIXI.InteractionManager.constructor = PIXI.InteractionManager;
+PIXI.InteractionManager.prototype.constructor = PIXI.InteractionManager;
 
 /**
  * Collects an interactive sprite recursively to have their interactions managed
@@ -618,4 +618,4 @@
 }
 
 // constructor
-PIXI.InteractionData.constructor = PIXI.InteractionData;
+PIXI.InteractionData.prototype.constructor = PIXI.InteractionData;
diff --git a/src/pixi/core/Circle.js b/src/pixi/core/Circle.js
index 6c3433d..a9ceed0 100644
--- a/src/pixi/core/Circle.js
+++ b/src/pixi/core/Circle.js
@@ -69,5 +69,5 @@
     return (dx + dy <= r2);
 }
 
-PIXI.Circle.constructor = PIXI.Circle;
+PIXI.Circle.prototype.constructor = PIXI.Circle;
 
diff --git a/src/pixi/core/Ellipse.js b/src/pixi/core/Ellipse.js
index a0703ad..dd369da 100644
--- a/src/pixi/core/Ellipse.js
+++ b/src/pixi/core/Ellipse.js
@@ -83,5 +83,5 @@
     return new PIXI.Rectangle(this.x, this.y, this.width, this.height);
 }
 
-PIXI.Ellipse.constructor = PIXI.Ellipse;
+PIXI.Ellipse.prototype.constructor = PIXI.Ellipse;
 
diff --git a/src/pixi/core/Point.js b/src/pixi/core/Point.js
index 294a8f8..8520861 100644
--- a/src/pixi/core/Point.js
+++ b/src/pixi/core/Point.js
@@ -39,5 +39,5 @@
 }
 
 // constructor
-PIXI.Point.constructor = PIXI.Point;
+PIXI.Point.prototype.constructor = PIXI.Point;
 
diff --git a/src/pixi/core/Polygon.js b/src/pixi/core/Polygon.js
index 5c1db06..47cf17b 100644
--- a/src/pixi/core/Polygon.js
+++ b/src/pixi/core/Polygon.js
@@ -73,5 +73,5 @@
     return inside;
 }
 
-PIXI.Polygon.constructor = PIXI.Polygon;
+PIXI.Polygon.prototype.constructor = PIXI.Polygon;
 
diff --git a/src/pixi/core/Rectangle.js b/src/pixi/core/Rectangle.js
index 64acf7a..66fb5d6 100644
--- a/src/pixi/core/Rectangle.js
+++ b/src/pixi/core/Rectangle.js
@@ -82,5 +82,5 @@
 }
 
 // constructor
-PIXI.Rectangle.constructor = PIXI.Rectangle;
+PIXI.Rectangle.prototype.constructor = PIXI.Rectangle;
 
diff --git a/src/pixi/display/DisplayObject.js b/src/pixi/display/DisplayObject.js
index 3b51aaf..f8ee024 100644
--- a/src/pixi/display/DisplayObject.js
+++ b/src/pixi/display/DisplayObject.js
@@ -258,7 +258,7 @@
 }
 
 // constructor
-PIXI.DisplayObject.constructor = PIXI.DisplayObject;
+PIXI.DisplayObject.prototype.constructor = PIXI.DisplayObject;
 
 //TODO make visible a getter setter
 /*
diff --git a/src/pixi/display/DisplayObjectContainer.js b/src/pixi/display/DisplayObjectContainer.js
index 4a3a204..649169f 100644
--- a/src/pixi/display/DisplayObjectContainer.js
+++ b/src/pixi/display/DisplayObjectContainer.js
@@ -26,8 +26,8 @@
 }
 
 // constructor
-PIXI.DisplayObjectContainer.constructor = PIXI.DisplayObjectContainer;
 PIXI.DisplayObjectContainer.prototype = Object.create( PIXI.DisplayObject.prototype );
+PIXI.DisplayObjectContainer.prototype.constructor = PIXI.DisplayObjectContainer;
 
 //TODO make visible a getter setter
 /*
diff --git a/src/pixi/display/MovieClip.js b/src/pixi/display/MovieClip.js
index b435ffe..7a77856 100644
--- a/src/pixi/display/MovieClip.js
+++ b/src/pixi/display/MovieClip.js
@@ -69,8 +69,8 @@
 }
 
 // constructor
-PIXI.MovieClip.constructor = PIXI.MovieClip;
 PIXI.MovieClip.prototype = Object.create( PIXI.Sprite.prototype );
+PIXI.MovieClip.prototype.constructor = PIXI.MovieClip;
 
 /**
  * Stops the MovieClip
diff --git a/src/pixi/display/Sprite.js b/src/pixi/display/Sprite.js
index 945331a..0713205 100644
--- a/src/pixi/display/Sprite.js
+++ b/src/pixi/display/Sprite.js
@@ -80,8 +80,8 @@
 }
 
 // constructor
-PIXI.Sprite.constructor = PIXI.Sprite;
 PIXI.Sprite.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Sprite.prototype.constructor = PIXI.Sprite;
 
 /**
  * The width of the sprite, setting this will actually modify the scale to acheive the value set
diff --git a/src/pixi/display/Stage.js b/src/pixi/display/Stage.js
index 447d77a..681c91b 100644
--- a/src/pixi/display/Stage.js
+++ b/src/pixi/display/Stage.js
@@ -65,8 +65,8 @@
 }
 
 // constructor
-PIXI.Stage.constructor = PIXI.Stage;
 PIXI.Stage.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Stage.prototype.constructor = PIXI.Stage;
 
 /*
  * Updates the object transform for rendering

diff --git a/src/pixi/InteractionManager.js b/src/pixi/InteractionManager.js
index bdbb276..e125dc8 100644
--- a/src/pixi/InteractionManager.js
+++ b/src/pixi/InteractionManager.js
@@ -53,7 +53,7 @@
 }
 
 // constructor
-PIXI.InteractionManager.constructor = PIXI.InteractionManager;
+PIXI.InteractionManager.prototype.constructor = PIXI.InteractionManager;
 
 /**
  * Collects an interactive sprite recursively to have their interactions managed
@@ -618,4 +618,4 @@
 }
 
 // constructor
-PIXI.InteractionData.constructor = PIXI.InteractionData;
+PIXI.InteractionData.prototype.constructor = PIXI.InteractionData;
diff --git a/src/pixi/core/Circle.js b/src/pixi/core/Circle.js
index 6c3433d..a9ceed0 100644
--- a/src/pixi/core/Circle.js
+++ b/src/pixi/core/Circle.js
@@ -69,5 +69,5 @@
     return (dx + dy <= r2);
 }
 
-PIXI.Circle.constructor = PIXI.Circle;
+PIXI.Circle.prototype.constructor = PIXI.Circle;
 
diff --git a/src/pixi/core/Ellipse.js b/src/pixi/core/Ellipse.js
index a0703ad..dd369da 100644
--- a/src/pixi/core/Ellipse.js
+++ b/src/pixi/core/Ellipse.js
@@ -83,5 +83,5 @@
     return new PIXI.Rectangle(this.x, this.y, this.width, this.height);
 }
 
-PIXI.Ellipse.constructor = PIXI.Ellipse;
+PIXI.Ellipse.prototype.constructor = PIXI.Ellipse;
 
diff --git a/src/pixi/core/Point.js b/src/pixi/core/Point.js
index 294a8f8..8520861 100644
--- a/src/pixi/core/Point.js
+++ b/src/pixi/core/Point.js
@@ -39,5 +39,5 @@
 }
 
 // constructor
-PIXI.Point.constructor = PIXI.Point;
+PIXI.Point.prototype.constructor = PIXI.Point;
 
diff --git a/src/pixi/core/Polygon.js b/src/pixi/core/Polygon.js
index 5c1db06..47cf17b 100644
--- a/src/pixi/core/Polygon.js
+++ b/src/pixi/core/Polygon.js
@@ -73,5 +73,5 @@
     return inside;
 }
 
-PIXI.Polygon.constructor = PIXI.Polygon;
+PIXI.Polygon.prototype.constructor = PIXI.Polygon;
 
diff --git a/src/pixi/core/Rectangle.js b/src/pixi/core/Rectangle.js
index 64acf7a..66fb5d6 100644
--- a/src/pixi/core/Rectangle.js
+++ b/src/pixi/core/Rectangle.js
@@ -82,5 +82,5 @@
 }
 
 // constructor
-PIXI.Rectangle.constructor = PIXI.Rectangle;
+PIXI.Rectangle.prototype.constructor = PIXI.Rectangle;
 
diff --git a/src/pixi/display/DisplayObject.js b/src/pixi/display/DisplayObject.js
index 3b51aaf..f8ee024 100644
--- a/src/pixi/display/DisplayObject.js
+++ b/src/pixi/display/DisplayObject.js
@@ -258,7 +258,7 @@
 }
 
 // constructor
-PIXI.DisplayObject.constructor = PIXI.DisplayObject;
+PIXI.DisplayObject.prototype.constructor = PIXI.DisplayObject;
 
 //TODO make visible a getter setter
 /*
diff --git a/src/pixi/display/DisplayObjectContainer.js b/src/pixi/display/DisplayObjectContainer.js
index 4a3a204..649169f 100644
--- a/src/pixi/display/DisplayObjectContainer.js
+++ b/src/pixi/display/DisplayObjectContainer.js
@@ -26,8 +26,8 @@
 }
 
 // constructor
-PIXI.DisplayObjectContainer.constructor = PIXI.DisplayObjectContainer;
 PIXI.DisplayObjectContainer.prototype = Object.create( PIXI.DisplayObject.prototype );
+PIXI.DisplayObjectContainer.prototype.constructor = PIXI.DisplayObjectContainer;
 
 //TODO make visible a getter setter
 /*
diff --git a/src/pixi/display/MovieClip.js b/src/pixi/display/MovieClip.js
index b435ffe..7a77856 100644
--- a/src/pixi/display/MovieClip.js
+++ b/src/pixi/display/MovieClip.js
@@ -69,8 +69,8 @@
 }
 
 // constructor
-PIXI.MovieClip.constructor = PIXI.MovieClip;
 PIXI.MovieClip.prototype = Object.create( PIXI.Sprite.prototype );
+PIXI.MovieClip.prototype.constructor = PIXI.MovieClip;
 
 /**
  * Stops the MovieClip
diff --git a/src/pixi/display/Sprite.js b/src/pixi/display/Sprite.js
index 945331a..0713205 100644
--- a/src/pixi/display/Sprite.js
+++ b/src/pixi/display/Sprite.js
@@ -80,8 +80,8 @@
 }
 
 // constructor
-PIXI.Sprite.constructor = PIXI.Sprite;
 PIXI.Sprite.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Sprite.prototype.constructor = PIXI.Sprite;
 
 /**
  * The width of the sprite, setting this will actually modify the scale to acheive the value set
diff --git a/src/pixi/display/Stage.js b/src/pixi/display/Stage.js
index 447d77a..681c91b 100644
--- a/src/pixi/display/Stage.js
+++ b/src/pixi/display/Stage.js
@@ -65,8 +65,8 @@
 }
 
 // constructor
-PIXI.Stage.constructor = PIXI.Stage;
 PIXI.Stage.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Stage.prototype.constructor = PIXI.Stage;
 
 /*
  * Updates the object transform for rendering
diff --git a/src/pixi/extras/CustomRenderable.js b/src/pixi/extras/CustomRenderable.js
index 7477195..eb0dc5b 100644
--- a/src/pixi/extras/CustomRenderable.js
+++ b/src/pixi/extras/CustomRenderable.js
@@ -17,8 +17,8 @@
 }
 
 // constructor
-PIXI.CustomRenderable.constructor = PIXI.CustomRenderable;
 PIXI.CustomRenderable.prototype = Object.create( PIXI.DisplayObject.prototype );
+PIXI.CustomRenderable.prototype.constructor = PIXI.CustomRenderable;
 
 /**
  * If this object is being rendered by a CanvasRenderer it will call this callback

diff --git a/src/pixi/InteractionManager.js b/src/pixi/InteractionManager.js
index bdbb276..e125dc8 100644
--- a/src/pixi/InteractionManager.js
+++ b/src/pixi/InteractionManager.js
@@ -53,7 +53,7 @@
 }
 
 // constructor
-PIXI.InteractionManager.constructor = PIXI.InteractionManager;
+PIXI.InteractionManager.prototype.constructor = PIXI.InteractionManager;
 
 /**
  * Collects an interactive sprite recursively to have their interactions managed
@@ -618,4 +618,4 @@
 }
 
 // constructor
-PIXI.InteractionData.constructor = PIXI.InteractionData;
+PIXI.InteractionData.prototype.constructor = PIXI.InteractionData;
diff --git a/src/pixi/core/Circle.js b/src/pixi/core/Circle.js
index 6c3433d..a9ceed0 100644
--- a/src/pixi/core/Circle.js
+++ b/src/pixi/core/Circle.js
@@ -69,5 +69,5 @@
     return (dx + dy <= r2);
 }
 
-PIXI.Circle.constructor = PIXI.Circle;
+PIXI.Circle.prototype.constructor = PIXI.Circle;
 
diff --git a/src/pixi/core/Ellipse.js b/src/pixi/core/Ellipse.js
index a0703ad..dd369da 100644
--- a/src/pixi/core/Ellipse.js
+++ b/src/pixi/core/Ellipse.js
@@ -83,5 +83,5 @@
     return new PIXI.Rectangle(this.x, this.y, this.width, this.height);
 }
 
-PIXI.Ellipse.constructor = PIXI.Ellipse;
+PIXI.Ellipse.prototype.constructor = PIXI.Ellipse;
 
diff --git a/src/pixi/core/Point.js b/src/pixi/core/Point.js
index 294a8f8..8520861 100644
--- a/src/pixi/core/Point.js
+++ b/src/pixi/core/Point.js
@@ -39,5 +39,5 @@
 }
 
 // constructor
-PIXI.Point.constructor = PIXI.Point;
+PIXI.Point.prototype.constructor = PIXI.Point;
 
diff --git a/src/pixi/core/Polygon.js b/src/pixi/core/Polygon.js
index 5c1db06..47cf17b 100644
--- a/src/pixi/core/Polygon.js
+++ b/src/pixi/core/Polygon.js
@@ -73,5 +73,5 @@
     return inside;
 }
 
-PIXI.Polygon.constructor = PIXI.Polygon;
+PIXI.Polygon.prototype.constructor = PIXI.Polygon;
 
diff --git a/src/pixi/core/Rectangle.js b/src/pixi/core/Rectangle.js
index 64acf7a..66fb5d6 100644
--- a/src/pixi/core/Rectangle.js
+++ b/src/pixi/core/Rectangle.js
@@ -82,5 +82,5 @@
 }
 
 // constructor
-PIXI.Rectangle.constructor = PIXI.Rectangle;
+PIXI.Rectangle.prototype.constructor = PIXI.Rectangle;
 
diff --git a/src/pixi/display/DisplayObject.js b/src/pixi/display/DisplayObject.js
index 3b51aaf..f8ee024 100644
--- a/src/pixi/display/DisplayObject.js
+++ b/src/pixi/display/DisplayObject.js
@@ -258,7 +258,7 @@
 }
 
 // constructor
-PIXI.DisplayObject.constructor = PIXI.DisplayObject;
+PIXI.DisplayObject.prototype.constructor = PIXI.DisplayObject;
 
 //TODO make visible a getter setter
 /*
diff --git a/src/pixi/display/DisplayObjectContainer.js b/src/pixi/display/DisplayObjectContainer.js
index 4a3a204..649169f 100644
--- a/src/pixi/display/DisplayObjectContainer.js
+++ b/src/pixi/display/DisplayObjectContainer.js
@@ -26,8 +26,8 @@
 }
 
 // constructor
-PIXI.DisplayObjectContainer.constructor = PIXI.DisplayObjectContainer;
 PIXI.DisplayObjectContainer.prototype = Object.create( PIXI.DisplayObject.prototype );
+PIXI.DisplayObjectContainer.prototype.constructor = PIXI.DisplayObjectContainer;
 
 //TODO make visible a getter setter
 /*
diff --git a/src/pixi/display/MovieClip.js b/src/pixi/display/MovieClip.js
index b435ffe..7a77856 100644
--- a/src/pixi/display/MovieClip.js
+++ b/src/pixi/display/MovieClip.js
@@ -69,8 +69,8 @@
 }
 
 // constructor
-PIXI.MovieClip.constructor = PIXI.MovieClip;
 PIXI.MovieClip.prototype = Object.create( PIXI.Sprite.prototype );
+PIXI.MovieClip.prototype.constructor = PIXI.MovieClip;
 
 /**
  * Stops the MovieClip
diff --git a/src/pixi/display/Sprite.js b/src/pixi/display/Sprite.js
index 945331a..0713205 100644
--- a/src/pixi/display/Sprite.js
+++ b/src/pixi/display/Sprite.js
@@ -80,8 +80,8 @@
 }
 
 // constructor
-PIXI.Sprite.constructor = PIXI.Sprite;
 PIXI.Sprite.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Sprite.prototype.constructor = PIXI.Sprite;
 
 /**
  * The width of the sprite, setting this will actually modify the scale to acheive the value set
diff --git a/src/pixi/display/Stage.js b/src/pixi/display/Stage.js
index 447d77a..681c91b 100644
--- a/src/pixi/display/Stage.js
+++ b/src/pixi/display/Stage.js
@@ -65,8 +65,8 @@
 }
 
 // constructor
-PIXI.Stage.constructor = PIXI.Stage;
 PIXI.Stage.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Stage.prototype.constructor = PIXI.Stage;
 
 /*
  * Updates the object transform for rendering
diff --git a/src/pixi/extras/CustomRenderable.js b/src/pixi/extras/CustomRenderable.js
index 7477195..eb0dc5b 100644
--- a/src/pixi/extras/CustomRenderable.js
+++ b/src/pixi/extras/CustomRenderable.js
@@ -17,8 +17,8 @@
 }
 
 // constructor
-PIXI.CustomRenderable.constructor = PIXI.CustomRenderable;
 PIXI.CustomRenderable.prototype = Object.create( PIXI.DisplayObject.prototype );
+PIXI.CustomRenderable.prototype.constructor = PIXI.CustomRenderable;
 
 /**
  * If this object is being rendered by a CanvasRenderer it will call this callback
diff --git a/src/pixi/extras/Rope.js b/src/pixi/extras/Rope.js
index 879fd13..1c057c8 100644
--- a/src/pixi/extras/Rope.js
+++ b/src/pixi/extras/Rope.js
@@ -29,8 +29,8 @@
 
 
 // constructor
-PIXI.Rope.constructor = PIXI.Rope;
 PIXI.Rope.prototype = Object.create( PIXI.Strip.prototype );
+PIXI.Rope.prototype.constructor = PIXI.Rope;
 
 PIXI.Rope.prototype.refresh = function()
 {

diff --git a/src/pixi/InteractionManager.js b/src/pixi/InteractionManager.js
index bdbb276..e125dc8 100644
--- a/src/pixi/InteractionManager.js
+++ b/src/pixi/InteractionManager.js
@@ -53,7 +53,7 @@
 }
 
 // constructor
-PIXI.InteractionManager.constructor = PIXI.InteractionManager;
+PIXI.InteractionManager.prototype.constructor = PIXI.InteractionManager;
 
 /**
  * Collects an interactive sprite recursively to have their interactions managed
@@ -618,4 +618,4 @@
 }
 
 // constructor
-PIXI.InteractionData.constructor = PIXI.InteractionData;
+PIXI.InteractionData.prototype.constructor = PIXI.InteractionData;
diff --git a/src/pixi/core/Circle.js b/src/pixi/core/Circle.js
index 6c3433d..a9ceed0 100644
--- a/src/pixi/core/Circle.js
+++ b/src/pixi/core/Circle.js
@@ -69,5 +69,5 @@
     return (dx + dy <= r2);
 }
 
-PIXI.Circle.constructor = PIXI.Circle;
+PIXI.Circle.prototype.constructor = PIXI.Circle;
 
diff --git a/src/pixi/core/Ellipse.js b/src/pixi/core/Ellipse.js
index a0703ad..dd369da 100644
--- a/src/pixi/core/Ellipse.js
+++ b/src/pixi/core/Ellipse.js
@@ -83,5 +83,5 @@
     return new PIXI.Rectangle(this.x, this.y, this.width, this.height);
 }
 
-PIXI.Ellipse.constructor = PIXI.Ellipse;
+PIXI.Ellipse.prototype.constructor = PIXI.Ellipse;
 
diff --git a/src/pixi/core/Point.js b/src/pixi/core/Point.js
index 294a8f8..8520861 100644
--- a/src/pixi/core/Point.js
+++ b/src/pixi/core/Point.js
@@ -39,5 +39,5 @@
 }
 
 // constructor
-PIXI.Point.constructor = PIXI.Point;
+PIXI.Point.prototype.constructor = PIXI.Point;
 
diff --git a/src/pixi/core/Polygon.js b/src/pixi/core/Polygon.js
index 5c1db06..47cf17b 100644
--- a/src/pixi/core/Polygon.js
+++ b/src/pixi/core/Polygon.js
@@ -73,5 +73,5 @@
     return inside;
 }
 
-PIXI.Polygon.constructor = PIXI.Polygon;
+PIXI.Polygon.prototype.constructor = PIXI.Polygon;
 
diff --git a/src/pixi/core/Rectangle.js b/src/pixi/core/Rectangle.js
index 64acf7a..66fb5d6 100644
--- a/src/pixi/core/Rectangle.js
+++ b/src/pixi/core/Rectangle.js
@@ -82,5 +82,5 @@
 }
 
 // constructor
-PIXI.Rectangle.constructor = PIXI.Rectangle;
+PIXI.Rectangle.prototype.constructor = PIXI.Rectangle;
 
diff --git a/src/pixi/display/DisplayObject.js b/src/pixi/display/DisplayObject.js
index 3b51aaf..f8ee024 100644
--- a/src/pixi/display/DisplayObject.js
+++ b/src/pixi/display/DisplayObject.js
@@ -258,7 +258,7 @@
 }
 
 // constructor
-PIXI.DisplayObject.constructor = PIXI.DisplayObject;
+PIXI.DisplayObject.prototype.constructor = PIXI.DisplayObject;
 
 //TODO make visible a getter setter
 /*
diff --git a/src/pixi/display/DisplayObjectContainer.js b/src/pixi/display/DisplayObjectContainer.js
index 4a3a204..649169f 100644
--- a/src/pixi/display/DisplayObjectContainer.js
+++ b/src/pixi/display/DisplayObjectContainer.js
@@ -26,8 +26,8 @@
 }
 
 // constructor
-PIXI.DisplayObjectContainer.constructor = PIXI.DisplayObjectContainer;
 PIXI.DisplayObjectContainer.prototype = Object.create( PIXI.DisplayObject.prototype );
+PIXI.DisplayObjectContainer.prototype.constructor = PIXI.DisplayObjectContainer;
 
 //TODO make visible a getter setter
 /*
diff --git a/src/pixi/display/MovieClip.js b/src/pixi/display/MovieClip.js
index b435ffe..7a77856 100644
--- a/src/pixi/display/MovieClip.js
+++ b/src/pixi/display/MovieClip.js
@@ -69,8 +69,8 @@
 }
 
 // constructor
-PIXI.MovieClip.constructor = PIXI.MovieClip;
 PIXI.MovieClip.prototype = Object.create( PIXI.Sprite.prototype );
+PIXI.MovieClip.prototype.constructor = PIXI.MovieClip;
 
 /**
  * Stops the MovieClip
diff --git a/src/pixi/display/Sprite.js b/src/pixi/display/Sprite.js
index 945331a..0713205 100644
--- a/src/pixi/display/Sprite.js
+++ b/src/pixi/display/Sprite.js
@@ -80,8 +80,8 @@
 }
 
 // constructor
-PIXI.Sprite.constructor = PIXI.Sprite;
 PIXI.Sprite.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Sprite.prototype.constructor = PIXI.Sprite;
 
 /**
  * The width of the sprite, setting this will actually modify the scale to acheive the value set
diff --git a/src/pixi/display/Stage.js b/src/pixi/display/Stage.js
index 447d77a..681c91b 100644
--- a/src/pixi/display/Stage.js
+++ b/src/pixi/display/Stage.js
@@ -65,8 +65,8 @@
 }
 
 // constructor
-PIXI.Stage.constructor = PIXI.Stage;
 PIXI.Stage.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Stage.prototype.constructor = PIXI.Stage;
 
 /*
  * Updates the object transform for rendering
diff --git a/src/pixi/extras/CustomRenderable.js b/src/pixi/extras/CustomRenderable.js
index 7477195..eb0dc5b 100644
--- a/src/pixi/extras/CustomRenderable.js
+++ b/src/pixi/extras/CustomRenderable.js
@@ -17,8 +17,8 @@
 }
 
 // constructor
-PIXI.CustomRenderable.constructor = PIXI.CustomRenderable;
 PIXI.CustomRenderable.prototype = Object.create( PIXI.DisplayObject.prototype );
+PIXI.CustomRenderable.prototype.constructor = PIXI.CustomRenderable;
 
 /**
  * If this object is being rendered by a CanvasRenderer it will call this callback
diff --git a/src/pixi/extras/Rope.js b/src/pixi/extras/Rope.js
index 879fd13..1c057c8 100644
--- a/src/pixi/extras/Rope.js
+++ b/src/pixi/extras/Rope.js
@@ -29,8 +29,8 @@
 
 
 // constructor
-PIXI.Rope.constructor = PIXI.Rope;
 PIXI.Rope.prototype = Object.create( PIXI.Strip.prototype );
+PIXI.Rope.prototype.constructor = PIXI.Rope;
 
 PIXI.Rope.prototype.refresh = function()
 {
diff --git a/src/pixi/extras/Spine.js b/src/pixi/extras/Spine.js
index 006fb6d..5ee161a 100644
--- a/src/pixi/extras/Spine.js
+++ b/src/pixi/extras/Spine.js
@@ -58,8 +58,8 @@
 	};
 }
 
-PIXI.Spine.constructor = PIXI.Spine;
 PIXI.Spine.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Spine.prototype.constructor = PIXI.Spine;
 
 /*
  * Updates the object transform for rendering

diff --git a/src/pixi/InteractionManager.js b/src/pixi/InteractionManager.js
index bdbb276..e125dc8 100644
--- a/src/pixi/InteractionManager.js
+++ b/src/pixi/InteractionManager.js
@@ -53,7 +53,7 @@
 }
 
 // constructor
-PIXI.InteractionManager.constructor = PIXI.InteractionManager;
+PIXI.InteractionManager.prototype.constructor = PIXI.InteractionManager;
 
 /**
  * Collects an interactive sprite recursively to have their interactions managed
@@ -618,4 +618,4 @@
 }
 
 // constructor
-PIXI.InteractionData.constructor = PIXI.InteractionData;
+PIXI.InteractionData.prototype.constructor = PIXI.InteractionData;
diff --git a/src/pixi/core/Circle.js b/src/pixi/core/Circle.js
index 6c3433d..a9ceed0 100644
--- a/src/pixi/core/Circle.js
+++ b/src/pixi/core/Circle.js
@@ -69,5 +69,5 @@
     return (dx + dy <= r2);
 }
 
-PIXI.Circle.constructor = PIXI.Circle;
+PIXI.Circle.prototype.constructor = PIXI.Circle;
 
diff --git a/src/pixi/core/Ellipse.js b/src/pixi/core/Ellipse.js
index a0703ad..dd369da 100644
--- a/src/pixi/core/Ellipse.js
+++ b/src/pixi/core/Ellipse.js
@@ -83,5 +83,5 @@
     return new PIXI.Rectangle(this.x, this.y, this.width, this.height);
 }
 
-PIXI.Ellipse.constructor = PIXI.Ellipse;
+PIXI.Ellipse.prototype.constructor = PIXI.Ellipse;
 
diff --git a/src/pixi/core/Point.js b/src/pixi/core/Point.js
index 294a8f8..8520861 100644
--- a/src/pixi/core/Point.js
+++ b/src/pixi/core/Point.js
@@ -39,5 +39,5 @@
 }
 
 // constructor
-PIXI.Point.constructor = PIXI.Point;
+PIXI.Point.prototype.constructor = PIXI.Point;
 
diff --git a/src/pixi/core/Polygon.js b/src/pixi/core/Polygon.js
index 5c1db06..47cf17b 100644
--- a/src/pixi/core/Polygon.js
+++ b/src/pixi/core/Polygon.js
@@ -73,5 +73,5 @@
     return inside;
 }
 
-PIXI.Polygon.constructor = PIXI.Polygon;
+PIXI.Polygon.prototype.constructor = PIXI.Polygon;
 
diff --git a/src/pixi/core/Rectangle.js b/src/pixi/core/Rectangle.js
index 64acf7a..66fb5d6 100644
--- a/src/pixi/core/Rectangle.js
+++ b/src/pixi/core/Rectangle.js
@@ -82,5 +82,5 @@
 }
 
 // constructor
-PIXI.Rectangle.constructor = PIXI.Rectangle;
+PIXI.Rectangle.prototype.constructor = PIXI.Rectangle;
 
diff --git a/src/pixi/display/DisplayObject.js b/src/pixi/display/DisplayObject.js
index 3b51aaf..f8ee024 100644
--- a/src/pixi/display/DisplayObject.js
+++ b/src/pixi/display/DisplayObject.js
@@ -258,7 +258,7 @@
 }
 
 // constructor
-PIXI.DisplayObject.constructor = PIXI.DisplayObject;
+PIXI.DisplayObject.prototype.constructor = PIXI.DisplayObject;
 
 //TODO make visible a getter setter
 /*
diff --git a/src/pixi/display/DisplayObjectContainer.js b/src/pixi/display/DisplayObjectContainer.js
index 4a3a204..649169f 100644
--- a/src/pixi/display/DisplayObjectContainer.js
+++ b/src/pixi/display/DisplayObjectContainer.js
@@ -26,8 +26,8 @@
 }
 
 // constructor
-PIXI.DisplayObjectContainer.constructor = PIXI.DisplayObjectContainer;
 PIXI.DisplayObjectContainer.prototype = Object.create( PIXI.DisplayObject.prototype );
+PIXI.DisplayObjectContainer.prototype.constructor = PIXI.DisplayObjectContainer;
 
 //TODO make visible a getter setter
 /*
diff --git a/src/pixi/display/MovieClip.js b/src/pixi/display/MovieClip.js
index b435ffe..7a77856 100644
--- a/src/pixi/display/MovieClip.js
+++ b/src/pixi/display/MovieClip.js
@@ -69,8 +69,8 @@
 }
 
 // constructor
-PIXI.MovieClip.constructor = PIXI.MovieClip;
 PIXI.MovieClip.prototype = Object.create( PIXI.Sprite.prototype );
+PIXI.MovieClip.prototype.constructor = PIXI.MovieClip;
 
 /**
  * Stops the MovieClip
diff --git a/src/pixi/display/Sprite.js b/src/pixi/display/Sprite.js
index 945331a..0713205 100644
--- a/src/pixi/display/Sprite.js
+++ b/src/pixi/display/Sprite.js
@@ -80,8 +80,8 @@
 }
 
 // constructor
-PIXI.Sprite.constructor = PIXI.Sprite;
 PIXI.Sprite.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Sprite.prototype.constructor = PIXI.Sprite;
 
 /**
  * The width of the sprite, setting this will actually modify the scale to acheive the value set
diff --git a/src/pixi/display/Stage.js b/src/pixi/display/Stage.js
index 447d77a..681c91b 100644
--- a/src/pixi/display/Stage.js
+++ b/src/pixi/display/Stage.js
@@ -65,8 +65,8 @@
 }
 
 // constructor
-PIXI.Stage.constructor = PIXI.Stage;
 PIXI.Stage.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Stage.prototype.constructor = PIXI.Stage;
 
 /*
  * Updates the object transform for rendering
diff --git a/src/pixi/extras/CustomRenderable.js b/src/pixi/extras/CustomRenderable.js
index 7477195..eb0dc5b 100644
--- a/src/pixi/extras/CustomRenderable.js
+++ b/src/pixi/extras/CustomRenderable.js
@@ -17,8 +17,8 @@
 }
 
 // constructor
-PIXI.CustomRenderable.constructor = PIXI.CustomRenderable;
 PIXI.CustomRenderable.prototype = Object.create( PIXI.DisplayObject.prototype );
+PIXI.CustomRenderable.prototype.constructor = PIXI.CustomRenderable;
 
 /**
  * If this object is being rendered by a CanvasRenderer it will call this callback
diff --git a/src/pixi/extras/Rope.js b/src/pixi/extras/Rope.js
index 879fd13..1c057c8 100644
--- a/src/pixi/extras/Rope.js
+++ b/src/pixi/extras/Rope.js
@@ -29,8 +29,8 @@
 
 
 // constructor
-PIXI.Rope.constructor = PIXI.Rope;
 PIXI.Rope.prototype = Object.create( PIXI.Strip.prototype );
+PIXI.Rope.prototype.constructor = PIXI.Rope;
 
 PIXI.Rope.prototype.refresh = function()
 {
diff --git a/src/pixi/extras/Spine.js b/src/pixi/extras/Spine.js
index 006fb6d..5ee161a 100644
--- a/src/pixi/extras/Spine.js
+++ b/src/pixi/extras/Spine.js
@@ -58,8 +58,8 @@
 	};
 }
 
-PIXI.Spine.constructor = PIXI.Spine;
 PIXI.Spine.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Spine.prototype.constructor = PIXI.Spine;
 
 /*
  * Updates the object transform for rendering
diff --git a/src/pixi/extras/Strip.js b/src/pixi/extras/Strip.js
index d2a6937..1e5ba3b 100644
--- a/src/pixi/extras/Strip.js
+++ b/src/pixi/extras/Strip.js
@@ -66,8 +66,8 @@
 }
 
 // constructor
-PIXI.Strip.constructor = PIXI.Strip;
 PIXI.Strip.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Strip.prototype.constructor = PIXI.Strip;
 
 PIXI.Strip.prototype.setTexture = function(texture)
 {

diff --git a/src/pixi/InteractionManager.js b/src/pixi/InteractionManager.js
index bdbb276..e125dc8 100644
--- a/src/pixi/InteractionManager.js
+++ b/src/pixi/InteractionManager.js
@@ -53,7 +53,7 @@
 }
 
 // constructor
-PIXI.InteractionManager.constructor = PIXI.InteractionManager;
+PIXI.InteractionManager.prototype.constructor = PIXI.InteractionManager;
 
 /**
  * Collects an interactive sprite recursively to have their interactions managed
@@ -618,4 +618,4 @@
 }
 
 // constructor
-PIXI.InteractionData.constructor = PIXI.InteractionData;
+PIXI.InteractionData.prototype.constructor = PIXI.InteractionData;
diff --git a/src/pixi/core/Circle.js b/src/pixi/core/Circle.js
index 6c3433d..a9ceed0 100644
--- a/src/pixi/core/Circle.js
+++ b/src/pixi/core/Circle.js
@@ -69,5 +69,5 @@
     return (dx + dy <= r2);
 }
 
-PIXI.Circle.constructor = PIXI.Circle;
+PIXI.Circle.prototype.constructor = PIXI.Circle;
 
diff --git a/src/pixi/core/Ellipse.js b/src/pixi/core/Ellipse.js
index a0703ad..dd369da 100644
--- a/src/pixi/core/Ellipse.js
+++ b/src/pixi/core/Ellipse.js
@@ -83,5 +83,5 @@
     return new PIXI.Rectangle(this.x, this.y, this.width, this.height);
 }
 
-PIXI.Ellipse.constructor = PIXI.Ellipse;
+PIXI.Ellipse.prototype.constructor = PIXI.Ellipse;
 
diff --git a/src/pixi/core/Point.js b/src/pixi/core/Point.js
index 294a8f8..8520861 100644
--- a/src/pixi/core/Point.js
+++ b/src/pixi/core/Point.js
@@ -39,5 +39,5 @@
 }
 
 // constructor
-PIXI.Point.constructor = PIXI.Point;
+PIXI.Point.prototype.constructor = PIXI.Point;
 
diff --git a/src/pixi/core/Polygon.js b/src/pixi/core/Polygon.js
index 5c1db06..47cf17b 100644
--- a/src/pixi/core/Polygon.js
+++ b/src/pixi/core/Polygon.js
@@ -73,5 +73,5 @@
     return inside;
 }
 
-PIXI.Polygon.constructor = PIXI.Polygon;
+PIXI.Polygon.prototype.constructor = PIXI.Polygon;
 
diff --git a/src/pixi/core/Rectangle.js b/src/pixi/core/Rectangle.js
index 64acf7a..66fb5d6 100644
--- a/src/pixi/core/Rectangle.js
+++ b/src/pixi/core/Rectangle.js
@@ -82,5 +82,5 @@
 }
 
 // constructor
-PIXI.Rectangle.constructor = PIXI.Rectangle;
+PIXI.Rectangle.prototype.constructor = PIXI.Rectangle;
 
diff --git a/src/pixi/display/DisplayObject.js b/src/pixi/display/DisplayObject.js
index 3b51aaf..f8ee024 100644
--- a/src/pixi/display/DisplayObject.js
+++ b/src/pixi/display/DisplayObject.js
@@ -258,7 +258,7 @@
 }
 
 // constructor
-PIXI.DisplayObject.constructor = PIXI.DisplayObject;
+PIXI.DisplayObject.prototype.constructor = PIXI.DisplayObject;
 
 //TODO make visible a getter setter
 /*
diff --git a/src/pixi/display/DisplayObjectContainer.js b/src/pixi/display/DisplayObjectContainer.js
index 4a3a204..649169f 100644
--- a/src/pixi/display/DisplayObjectContainer.js
+++ b/src/pixi/display/DisplayObjectContainer.js
@@ -26,8 +26,8 @@
 }
 
 // constructor
-PIXI.DisplayObjectContainer.constructor = PIXI.DisplayObjectContainer;
 PIXI.DisplayObjectContainer.prototype = Object.create( PIXI.DisplayObject.prototype );
+PIXI.DisplayObjectContainer.prototype.constructor = PIXI.DisplayObjectContainer;
 
 //TODO make visible a getter setter
 /*
diff --git a/src/pixi/display/MovieClip.js b/src/pixi/display/MovieClip.js
index b435ffe..7a77856 100644
--- a/src/pixi/display/MovieClip.js
+++ b/src/pixi/display/MovieClip.js
@@ -69,8 +69,8 @@
 }
 
 // constructor
-PIXI.MovieClip.constructor = PIXI.MovieClip;
 PIXI.MovieClip.prototype = Object.create( PIXI.Sprite.prototype );
+PIXI.MovieClip.prototype.constructor = PIXI.MovieClip;
 
 /**
  * Stops the MovieClip
diff --git a/src/pixi/display/Sprite.js b/src/pixi/display/Sprite.js
index 945331a..0713205 100644
--- a/src/pixi/display/Sprite.js
+++ b/src/pixi/display/Sprite.js
@@ -80,8 +80,8 @@
 }
 
 // constructor
-PIXI.Sprite.constructor = PIXI.Sprite;
 PIXI.Sprite.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Sprite.prototype.constructor = PIXI.Sprite;
 
 /**
  * The width of the sprite, setting this will actually modify the scale to acheive the value set
diff --git a/src/pixi/display/Stage.js b/src/pixi/display/Stage.js
index 447d77a..681c91b 100644
--- a/src/pixi/display/Stage.js
+++ b/src/pixi/display/Stage.js
@@ -65,8 +65,8 @@
 }
 
 // constructor
-PIXI.Stage.constructor = PIXI.Stage;
 PIXI.Stage.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Stage.prototype.constructor = PIXI.Stage;
 
 /*
  * Updates the object transform for rendering
diff --git a/src/pixi/extras/CustomRenderable.js b/src/pixi/extras/CustomRenderable.js
index 7477195..eb0dc5b 100644
--- a/src/pixi/extras/CustomRenderable.js
+++ b/src/pixi/extras/CustomRenderable.js
@@ -17,8 +17,8 @@
 }
 
 // constructor
-PIXI.CustomRenderable.constructor = PIXI.CustomRenderable;
 PIXI.CustomRenderable.prototype = Object.create( PIXI.DisplayObject.prototype );
+PIXI.CustomRenderable.prototype.constructor = PIXI.CustomRenderable;
 
 /**
  * If this object is being rendered by a CanvasRenderer it will call this callback
diff --git a/src/pixi/extras/Rope.js b/src/pixi/extras/Rope.js
index 879fd13..1c057c8 100644
--- a/src/pixi/extras/Rope.js
+++ b/src/pixi/extras/Rope.js
@@ -29,8 +29,8 @@
 
 
 // constructor
-PIXI.Rope.constructor = PIXI.Rope;
 PIXI.Rope.prototype = Object.create( PIXI.Strip.prototype );
+PIXI.Rope.prototype.constructor = PIXI.Rope;
 
 PIXI.Rope.prototype.refresh = function()
 {
diff --git a/src/pixi/extras/Spine.js b/src/pixi/extras/Spine.js
index 006fb6d..5ee161a 100644
--- a/src/pixi/extras/Spine.js
+++ b/src/pixi/extras/Spine.js
@@ -58,8 +58,8 @@
 	};
 }
 
-PIXI.Spine.constructor = PIXI.Spine;
 PIXI.Spine.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Spine.prototype.constructor = PIXI.Spine;
 
 /*
  * Updates the object transform for rendering
diff --git a/src/pixi/extras/Strip.js b/src/pixi/extras/Strip.js
index d2a6937..1e5ba3b 100644
--- a/src/pixi/extras/Strip.js
+++ b/src/pixi/extras/Strip.js
@@ -66,8 +66,8 @@
 }
 
 // constructor
-PIXI.Strip.constructor = PIXI.Strip;
 PIXI.Strip.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Strip.prototype.constructor = PIXI.Strip;
 
 PIXI.Strip.prototype.setTexture = function(texture)
 {
diff --git a/src/pixi/extras/TilingSprite.js b/src/pixi/extras/TilingSprite.js
index 9a49e1c..2cb17fa 100644
--- a/src/pixi/extras/TilingSprite.js
+++ b/src/pixi/extras/TilingSprite.js
@@ -62,8 +62,8 @@
 }
 
 // constructor
-PIXI.TilingSprite.constructor = PIXI.TilingSprite;
 PIXI.TilingSprite.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.TilingSprite.prototype.constructor = PIXI.TilingSprite;
 
 /**
  * Sets the texture of the tiling sprite

diff --git a/src/pixi/InteractionManager.js b/src/pixi/InteractionManager.js
index bdbb276..e125dc8 100644
--- a/src/pixi/InteractionManager.js
+++ b/src/pixi/InteractionManager.js
@@ -53,7 +53,7 @@
 }
 
 // constructor
-PIXI.InteractionManager.constructor = PIXI.InteractionManager;
+PIXI.InteractionManager.prototype.constructor = PIXI.InteractionManager;
 
 /**
  * Collects an interactive sprite recursively to have their interactions managed
@@ -618,4 +618,4 @@
 }
 
 // constructor
-PIXI.InteractionData.constructor = PIXI.InteractionData;
+PIXI.InteractionData.prototype.constructor = PIXI.InteractionData;
diff --git a/src/pixi/core/Circle.js b/src/pixi/core/Circle.js
index 6c3433d..a9ceed0 100644
--- a/src/pixi/core/Circle.js
+++ b/src/pixi/core/Circle.js
@@ -69,5 +69,5 @@
     return (dx + dy <= r2);
 }
 
-PIXI.Circle.constructor = PIXI.Circle;
+PIXI.Circle.prototype.constructor = PIXI.Circle;
 
diff --git a/src/pixi/core/Ellipse.js b/src/pixi/core/Ellipse.js
index a0703ad..dd369da 100644
--- a/src/pixi/core/Ellipse.js
+++ b/src/pixi/core/Ellipse.js
@@ -83,5 +83,5 @@
     return new PIXI.Rectangle(this.x, this.y, this.width, this.height);
 }
 
-PIXI.Ellipse.constructor = PIXI.Ellipse;
+PIXI.Ellipse.prototype.constructor = PIXI.Ellipse;
 
diff --git a/src/pixi/core/Point.js b/src/pixi/core/Point.js
index 294a8f8..8520861 100644
--- a/src/pixi/core/Point.js
+++ b/src/pixi/core/Point.js
@@ -39,5 +39,5 @@
 }
 
 // constructor
-PIXI.Point.constructor = PIXI.Point;
+PIXI.Point.prototype.constructor = PIXI.Point;
 
diff --git a/src/pixi/core/Polygon.js b/src/pixi/core/Polygon.js
index 5c1db06..47cf17b 100644
--- a/src/pixi/core/Polygon.js
+++ b/src/pixi/core/Polygon.js
@@ -73,5 +73,5 @@
     return inside;
 }
 
-PIXI.Polygon.constructor = PIXI.Polygon;
+PIXI.Polygon.prototype.constructor = PIXI.Polygon;
 
diff --git a/src/pixi/core/Rectangle.js b/src/pixi/core/Rectangle.js
index 64acf7a..66fb5d6 100644
--- a/src/pixi/core/Rectangle.js
+++ b/src/pixi/core/Rectangle.js
@@ -82,5 +82,5 @@
 }
 
 // constructor
-PIXI.Rectangle.constructor = PIXI.Rectangle;
+PIXI.Rectangle.prototype.constructor = PIXI.Rectangle;
 
diff --git a/src/pixi/display/DisplayObject.js b/src/pixi/display/DisplayObject.js
index 3b51aaf..f8ee024 100644
--- a/src/pixi/display/DisplayObject.js
+++ b/src/pixi/display/DisplayObject.js
@@ -258,7 +258,7 @@
 }
 
 // constructor
-PIXI.DisplayObject.constructor = PIXI.DisplayObject;
+PIXI.DisplayObject.prototype.constructor = PIXI.DisplayObject;
 
 //TODO make visible a getter setter
 /*
diff --git a/src/pixi/display/DisplayObjectContainer.js b/src/pixi/display/DisplayObjectContainer.js
index 4a3a204..649169f 100644
--- a/src/pixi/display/DisplayObjectContainer.js
+++ b/src/pixi/display/DisplayObjectContainer.js
@@ -26,8 +26,8 @@
 }
 
 // constructor
-PIXI.DisplayObjectContainer.constructor = PIXI.DisplayObjectContainer;
 PIXI.DisplayObjectContainer.prototype = Object.create( PIXI.DisplayObject.prototype );
+PIXI.DisplayObjectContainer.prototype.constructor = PIXI.DisplayObjectContainer;
 
 //TODO make visible a getter setter
 /*
diff --git a/src/pixi/display/MovieClip.js b/src/pixi/display/MovieClip.js
index b435ffe..7a77856 100644
--- a/src/pixi/display/MovieClip.js
+++ b/src/pixi/display/MovieClip.js
@@ -69,8 +69,8 @@
 }
 
 // constructor
-PIXI.MovieClip.constructor = PIXI.MovieClip;
 PIXI.MovieClip.prototype = Object.create( PIXI.Sprite.prototype );
+PIXI.MovieClip.prototype.constructor = PIXI.MovieClip;
 
 /**
  * Stops the MovieClip
diff --git a/src/pixi/display/Sprite.js b/src/pixi/display/Sprite.js
index 945331a..0713205 100644
--- a/src/pixi/display/Sprite.js
+++ b/src/pixi/display/Sprite.js
@@ -80,8 +80,8 @@
 }
 
 // constructor
-PIXI.Sprite.constructor = PIXI.Sprite;
 PIXI.Sprite.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Sprite.prototype.constructor = PIXI.Sprite;
 
 /**
  * The width of the sprite, setting this will actually modify the scale to acheive the value set
diff --git a/src/pixi/display/Stage.js b/src/pixi/display/Stage.js
index 447d77a..681c91b 100644
--- a/src/pixi/display/Stage.js
+++ b/src/pixi/display/Stage.js
@@ -65,8 +65,8 @@
 }
 
 // constructor
-PIXI.Stage.constructor = PIXI.Stage;
 PIXI.Stage.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Stage.prototype.constructor = PIXI.Stage;
 
 /*
  * Updates the object transform for rendering
diff --git a/src/pixi/extras/CustomRenderable.js b/src/pixi/extras/CustomRenderable.js
index 7477195..eb0dc5b 100644
--- a/src/pixi/extras/CustomRenderable.js
+++ b/src/pixi/extras/CustomRenderable.js
@@ -17,8 +17,8 @@
 }
 
 // constructor
-PIXI.CustomRenderable.constructor = PIXI.CustomRenderable;
 PIXI.CustomRenderable.prototype = Object.create( PIXI.DisplayObject.prototype );
+PIXI.CustomRenderable.prototype.constructor = PIXI.CustomRenderable;
 
 /**
  * If this object is being rendered by a CanvasRenderer it will call this callback
diff --git a/src/pixi/extras/Rope.js b/src/pixi/extras/Rope.js
index 879fd13..1c057c8 100644
--- a/src/pixi/extras/Rope.js
+++ b/src/pixi/extras/Rope.js
@@ -29,8 +29,8 @@
 
 
 // constructor
-PIXI.Rope.constructor = PIXI.Rope;
 PIXI.Rope.prototype = Object.create( PIXI.Strip.prototype );
+PIXI.Rope.prototype.constructor = PIXI.Rope;
 
 PIXI.Rope.prototype.refresh = function()
 {
diff --git a/src/pixi/extras/Spine.js b/src/pixi/extras/Spine.js
index 006fb6d..5ee161a 100644
--- a/src/pixi/extras/Spine.js
+++ b/src/pixi/extras/Spine.js
@@ -58,8 +58,8 @@
 	};
 }
 
-PIXI.Spine.constructor = PIXI.Spine;
 PIXI.Spine.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Spine.prototype.constructor = PIXI.Spine;
 
 /*
  * Updates the object transform for rendering
diff --git a/src/pixi/extras/Strip.js b/src/pixi/extras/Strip.js
index d2a6937..1e5ba3b 100644
--- a/src/pixi/extras/Strip.js
+++ b/src/pixi/extras/Strip.js
@@ -66,8 +66,8 @@
 }
 
 // constructor
-PIXI.Strip.constructor = PIXI.Strip;
 PIXI.Strip.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Strip.prototype.constructor = PIXI.Strip;
 
 PIXI.Strip.prototype.setTexture = function(texture)
 {
diff --git a/src/pixi/extras/TilingSprite.js b/src/pixi/extras/TilingSprite.js
index 9a49e1c..2cb17fa 100644
--- a/src/pixi/extras/TilingSprite.js
+++ b/src/pixi/extras/TilingSprite.js
@@ -62,8 +62,8 @@
 }
 
 // constructor
-PIXI.TilingSprite.constructor = PIXI.TilingSprite;
 PIXI.TilingSprite.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.TilingSprite.prototype.constructor = PIXI.TilingSprite;
 
 /**
  * Sets the texture of the tiling sprite
diff --git a/src/pixi/loaders/AssetLoader.js b/src/pixi/loaders/AssetLoader.js
index 7936b83..168a5f8 100644
--- a/src/pixi/loaders/AssetLoader.js
+++ b/src/pixi/loaders/AssetLoader.js
@@ -69,7 +69,7 @@
  */
 
 // constructor
-PIXI.AssetLoader.constructor = PIXI.AssetLoader;
+PIXI.AssetLoader.prototype.constructor = PIXI.AssetLoader;
 
 /**
  * Starts loading the assets sequentially

diff --git a/src/pixi/InteractionManager.js b/src/pixi/InteractionManager.js
index bdbb276..e125dc8 100644
--- a/src/pixi/InteractionManager.js
+++ b/src/pixi/InteractionManager.js
@@ -53,7 +53,7 @@
 }
 
 // constructor
-PIXI.InteractionManager.constructor = PIXI.InteractionManager;
+PIXI.InteractionManager.prototype.constructor = PIXI.InteractionManager;
 
 /**
  * Collects an interactive sprite recursively to have their interactions managed
@@ -618,4 +618,4 @@
 }
 
 // constructor
-PIXI.InteractionData.constructor = PIXI.InteractionData;
+PIXI.InteractionData.prototype.constructor = PIXI.InteractionData;
diff --git a/src/pixi/core/Circle.js b/src/pixi/core/Circle.js
index 6c3433d..a9ceed0 100644
--- a/src/pixi/core/Circle.js
+++ b/src/pixi/core/Circle.js
@@ -69,5 +69,5 @@
     return (dx + dy <= r2);
 }
 
-PIXI.Circle.constructor = PIXI.Circle;
+PIXI.Circle.prototype.constructor = PIXI.Circle;
 
diff --git a/src/pixi/core/Ellipse.js b/src/pixi/core/Ellipse.js
index a0703ad..dd369da 100644
--- a/src/pixi/core/Ellipse.js
+++ b/src/pixi/core/Ellipse.js
@@ -83,5 +83,5 @@
     return new PIXI.Rectangle(this.x, this.y, this.width, this.height);
 }
 
-PIXI.Ellipse.constructor = PIXI.Ellipse;
+PIXI.Ellipse.prototype.constructor = PIXI.Ellipse;
 
diff --git a/src/pixi/core/Point.js b/src/pixi/core/Point.js
index 294a8f8..8520861 100644
--- a/src/pixi/core/Point.js
+++ b/src/pixi/core/Point.js
@@ -39,5 +39,5 @@
 }
 
 // constructor
-PIXI.Point.constructor = PIXI.Point;
+PIXI.Point.prototype.constructor = PIXI.Point;
 
diff --git a/src/pixi/core/Polygon.js b/src/pixi/core/Polygon.js
index 5c1db06..47cf17b 100644
--- a/src/pixi/core/Polygon.js
+++ b/src/pixi/core/Polygon.js
@@ -73,5 +73,5 @@
     return inside;
 }
 
-PIXI.Polygon.constructor = PIXI.Polygon;
+PIXI.Polygon.prototype.constructor = PIXI.Polygon;
 
diff --git a/src/pixi/core/Rectangle.js b/src/pixi/core/Rectangle.js
index 64acf7a..66fb5d6 100644
--- a/src/pixi/core/Rectangle.js
+++ b/src/pixi/core/Rectangle.js
@@ -82,5 +82,5 @@
 }
 
 // constructor
-PIXI.Rectangle.constructor = PIXI.Rectangle;
+PIXI.Rectangle.prototype.constructor = PIXI.Rectangle;
 
diff --git a/src/pixi/display/DisplayObject.js b/src/pixi/display/DisplayObject.js
index 3b51aaf..f8ee024 100644
--- a/src/pixi/display/DisplayObject.js
+++ b/src/pixi/display/DisplayObject.js
@@ -258,7 +258,7 @@
 }
 
 // constructor
-PIXI.DisplayObject.constructor = PIXI.DisplayObject;
+PIXI.DisplayObject.prototype.constructor = PIXI.DisplayObject;
 
 //TODO make visible a getter setter
 /*
diff --git a/src/pixi/display/DisplayObjectContainer.js b/src/pixi/display/DisplayObjectContainer.js
index 4a3a204..649169f 100644
--- a/src/pixi/display/DisplayObjectContainer.js
+++ b/src/pixi/display/DisplayObjectContainer.js
@@ -26,8 +26,8 @@
 }
 
 // constructor
-PIXI.DisplayObjectContainer.constructor = PIXI.DisplayObjectContainer;
 PIXI.DisplayObjectContainer.prototype = Object.create( PIXI.DisplayObject.prototype );
+PIXI.DisplayObjectContainer.prototype.constructor = PIXI.DisplayObjectContainer;
 
 //TODO make visible a getter setter
 /*
diff --git a/src/pixi/display/MovieClip.js b/src/pixi/display/MovieClip.js
index b435ffe..7a77856 100644
--- a/src/pixi/display/MovieClip.js
+++ b/src/pixi/display/MovieClip.js
@@ -69,8 +69,8 @@
 }
 
 // constructor
-PIXI.MovieClip.constructor = PIXI.MovieClip;
 PIXI.MovieClip.prototype = Object.create( PIXI.Sprite.prototype );
+PIXI.MovieClip.prototype.constructor = PIXI.MovieClip;
 
 /**
  * Stops the MovieClip
diff --git a/src/pixi/display/Sprite.js b/src/pixi/display/Sprite.js
index 945331a..0713205 100644
--- a/src/pixi/display/Sprite.js
+++ b/src/pixi/display/Sprite.js
@@ -80,8 +80,8 @@
 }
 
 // constructor
-PIXI.Sprite.constructor = PIXI.Sprite;
 PIXI.Sprite.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Sprite.prototype.constructor = PIXI.Sprite;
 
 /**
  * The width of the sprite, setting this will actually modify the scale to acheive the value set
diff --git a/src/pixi/display/Stage.js b/src/pixi/display/Stage.js
index 447d77a..681c91b 100644
--- a/src/pixi/display/Stage.js
+++ b/src/pixi/display/Stage.js
@@ -65,8 +65,8 @@
 }
 
 // constructor
-PIXI.Stage.constructor = PIXI.Stage;
 PIXI.Stage.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Stage.prototype.constructor = PIXI.Stage;
 
 /*
  * Updates the object transform for rendering
diff --git a/src/pixi/extras/CustomRenderable.js b/src/pixi/extras/CustomRenderable.js
index 7477195..eb0dc5b 100644
--- a/src/pixi/extras/CustomRenderable.js
+++ b/src/pixi/extras/CustomRenderable.js
@@ -17,8 +17,8 @@
 }
 
 // constructor
-PIXI.CustomRenderable.constructor = PIXI.CustomRenderable;
 PIXI.CustomRenderable.prototype = Object.create( PIXI.DisplayObject.prototype );
+PIXI.CustomRenderable.prototype.constructor = PIXI.CustomRenderable;
 
 /**
  * If this object is being rendered by a CanvasRenderer it will call this callback
diff --git a/src/pixi/extras/Rope.js b/src/pixi/extras/Rope.js
index 879fd13..1c057c8 100644
--- a/src/pixi/extras/Rope.js
+++ b/src/pixi/extras/Rope.js
@@ -29,8 +29,8 @@
 
 
 // constructor
-PIXI.Rope.constructor = PIXI.Rope;
 PIXI.Rope.prototype = Object.create( PIXI.Strip.prototype );
+PIXI.Rope.prototype.constructor = PIXI.Rope;
 
 PIXI.Rope.prototype.refresh = function()
 {
diff --git a/src/pixi/extras/Spine.js b/src/pixi/extras/Spine.js
index 006fb6d..5ee161a 100644
--- a/src/pixi/extras/Spine.js
+++ b/src/pixi/extras/Spine.js
@@ -58,8 +58,8 @@
 	};
 }
 
-PIXI.Spine.constructor = PIXI.Spine;
 PIXI.Spine.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Spine.prototype.constructor = PIXI.Spine;
 
 /*
  * Updates the object transform for rendering
diff --git a/src/pixi/extras/Strip.js b/src/pixi/extras/Strip.js
index d2a6937..1e5ba3b 100644
--- a/src/pixi/extras/Strip.js
+++ b/src/pixi/extras/Strip.js
@@ -66,8 +66,8 @@
 }
 
 // constructor
-PIXI.Strip.constructor = PIXI.Strip;
 PIXI.Strip.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Strip.prototype.constructor = PIXI.Strip;
 
 PIXI.Strip.prototype.setTexture = function(texture)
 {
diff --git a/src/pixi/extras/TilingSprite.js b/src/pixi/extras/TilingSprite.js
index 9a49e1c..2cb17fa 100644
--- a/src/pixi/extras/TilingSprite.js
+++ b/src/pixi/extras/TilingSprite.js
@@ -62,8 +62,8 @@
 }
 
 // constructor
-PIXI.TilingSprite.constructor = PIXI.TilingSprite;
 PIXI.TilingSprite.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.TilingSprite.prototype.constructor = PIXI.TilingSprite;
 
 /**
  * Sets the texture of the tiling sprite
diff --git a/src/pixi/loaders/AssetLoader.js b/src/pixi/loaders/AssetLoader.js
index 7936b83..168a5f8 100644
--- a/src/pixi/loaders/AssetLoader.js
+++ b/src/pixi/loaders/AssetLoader.js
@@ -69,7 +69,7 @@
  */
 
 // constructor
-PIXI.AssetLoader.constructor = PIXI.AssetLoader;
+PIXI.AssetLoader.prototype.constructor = PIXI.AssetLoader;
 
 /**
  * Starts loading the assets sequentially
diff --git a/src/pixi/loaders/BitmapFontLoader.js b/src/pixi/loaders/BitmapFontLoader.js
index af08b83..4afd8aa 100644
--- a/src/pixi/loaders/BitmapFontLoader.js
+++ b/src/pixi/loaders/BitmapFontLoader.js
@@ -58,7 +58,7 @@
 };
 
 // constructor
-PIXI.BitmapFontLoader.constructor = PIXI.BitmapFontLoader;
+PIXI.BitmapFontLoader.prototype.constructor = PIXI.BitmapFontLoader;
 
 /**
  * Loads the XML font data

diff --git a/src/pixi/InteractionManager.js b/src/pixi/InteractionManager.js
index bdbb276..e125dc8 100644
--- a/src/pixi/InteractionManager.js
+++ b/src/pixi/InteractionManager.js
@@ -53,7 +53,7 @@
 }
 
 // constructor
-PIXI.InteractionManager.constructor = PIXI.InteractionManager;
+PIXI.InteractionManager.prototype.constructor = PIXI.InteractionManager;
 
 /**
  * Collects an interactive sprite recursively to have their interactions managed
@@ -618,4 +618,4 @@
 }
 
 // constructor
-PIXI.InteractionData.constructor = PIXI.InteractionData;
+PIXI.InteractionData.prototype.constructor = PIXI.InteractionData;
diff --git a/src/pixi/core/Circle.js b/src/pixi/core/Circle.js
index 6c3433d..a9ceed0 100644
--- a/src/pixi/core/Circle.js
+++ b/src/pixi/core/Circle.js
@@ -69,5 +69,5 @@
     return (dx + dy <= r2);
 }
 
-PIXI.Circle.constructor = PIXI.Circle;
+PIXI.Circle.prototype.constructor = PIXI.Circle;
 
diff --git a/src/pixi/core/Ellipse.js b/src/pixi/core/Ellipse.js
index a0703ad..dd369da 100644
--- a/src/pixi/core/Ellipse.js
+++ b/src/pixi/core/Ellipse.js
@@ -83,5 +83,5 @@
     return new PIXI.Rectangle(this.x, this.y, this.width, this.height);
 }
 
-PIXI.Ellipse.constructor = PIXI.Ellipse;
+PIXI.Ellipse.prototype.constructor = PIXI.Ellipse;
 
diff --git a/src/pixi/core/Point.js b/src/pixi/core/Point.js
index 294a8f8..8520861 100644
--- a/src/pixi/core/Point.js
+++ b/src/pixi/core/Point.js
@@ -39,5 +39,5 @@
 }
 
 // constructor
-PIXI.Point.constructor = PIXI.Point;
+PIXI.Point.prototype.constructor = PIXI.Point;
 
diff --git a/src/pixi/core/Polygon.js b/src/pixi/core/Polygon.js
index 5c1db06..47cf17b 100644
--- a/src/pixi/core/Polygon.js
+++ b/src/pixi/core/Polygon.js
@@ -73,5 +73,5 @@
     return inside;
 }
 
-PIXI.Polygon.constructor = PIXI.Polygon;
+PIXI.Polygon.prototype.constructor = PIXI.Polygon;
 
diff --git a/src/pixi/core/Rectangle.js b/src/pixi/core/Rectangle.js
index 64acf7a..66fb5d6 100644
--- a/src/pixi/core/Rectangle.js
+++ b/src/pixi/core/Rectangle.js
@@ -82,5 +82,5 @@
 }
 
 // constructor
-PIXI.Rectangle.constructor = PIXI.Rectangle;
+PIXI.Rectangle.prototype.constructor = PIXI.Rectangle;
 
diff --git a/src/pixi/display/DisplayObject.js b/src/pixi/display/DisplayObject.js
index 3b51aaf..f8ee024 100644
--- a/src/pixi/display/DisplayObject.js
+++ b/src/pixi/display/DisplayObject.js
@@ -258,7 +258,7 @@
 }
 
 // constructor
-PIXI.DisplayObject.constructor = PIXI.DisplayObject;
+PIXI.DisplayObject.prototype.constructor = PIXI.DisplayObject;
 
 //TODO make visible a getter setter
 /*
diff --git a/src/pixi/display/DisplayObjectContainer.js b/src/pixi/display/DisplayObjectContainer.js
index 4a3a204..649169f 100644
--- a/src/pixi/display/DisplayObjectContainer.js
+++ b/src/pixi/display/DisplayObjectContainer.js
@@ -26,8 +26,8 @@
 }
 
 // constructor
-PIXI.DisplayObjectContainer.constructor = PIXI.DisplayObjectContainer;
 PIXI.DisplayObjectContainer.prototype = Object.create( PIXI.DisplayObject.prototype );
+PIXI.DisplayObjectContainer.prototype.constructor = PIXI.DisplayObjectContainer;
 
 //TODO make visible a getter setter
 /*
diff --git a/src/pixi/display/MovieClip.js b/src/pixi/display/MovieClip.js
index b435ffe..7a77856 100644
--- a/src/pixi/display/MovieClip.js
+++ b/src/pixi/display/MovieClip.js
@@ -69,8 +69,8 @@
 }
 
 // constructor
-PIXI.MovieClip.constructor = PIXI.MovieClip;
 PIXI.MovieClip.prototype = Object.create( PIXI.Sprite.prototype );
+PIXI.MovieClip.prototype.constructor = PIXI.MovieClip;
 
 /**
  * Stops the MovieClip
diff --git a/src/pixi/display/Sprite.js b/src/pixi/display/Sprite.js
index 945331a..0713205 100644
--- a/src/pixi/display/Sprite.js
+++ b/src/pixi/display/Sprite.js
@@ -80,8 +80,8 @@
 }
 
 // constructor
-PIXI.Sprite.constructor = PIXI.Sprite;
 PIXI.Sprite.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Sprite.prototype.constructor = PIXI.Sprite;
 
 /**
  * The width of the sprite, setting this will actually modify the scale to acheive the value set
diff --git a/src/pixi/display/Stage.js b/src/pixi/display/Stage.js
index 447d77a..681c91b 100644
--- a/src/pixi/display/Stage.js
+++ b/src/pixi/display/Stage.js
@@ -65,8 +65,8 @@
 }
 
 // constructor
-PIXI.Stage.constructor = PIXI.Stage;
 PIXI.Stage.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Stage.prototype.constructor = PIXI.Stage;
 
 /*
  * Updates the object transform for rendering
diff --git a/src/pixi/extras/CustomRenderable.js b/src/pixi/extras/CustomRenderable.js
index 7477195..eb0dc5b 100644
--- a/src/pixi/extras/CustomRenderable.js
+++ b/src/pixi/extras/CustomRenderable.js
@@ -17,8 +17,8 @@
 }
 
 // constructor
-PIXI.CustomRenderable.constructor = PIXI.CustomRenderable;
 PIXI.CustomRenderable.prototype = Object.create( PIXI.DisplayObject.prototype );
+PIXI.CustomRenderable.prototype.constructor = PIXI.CustomRenderable;
 
 /**
  * If this object is being rendered by a CanvasRenderer it will call this callback
diff --git a/src/pixi/extras/Rope.js b/src/pixi/extras/Rope.js
index 879fd13..1c057c8 100644
--- a/src/pixi/extras/Rope.js
+++ b/src/pixi/extras/Rope.js
@@ -29,8 +29,8 @@
 
 
 // constructor
-PIXI.Rope.constructor = PIXI.Rope;
 PIXI.Rope.prototype = Object.create( PIXI.Strip.prototype );
+PIXI.Rope.prototype.constructor = PIXI.Rope;
 
 PIXI.Rope.prototype.refresh = function()
 {
diff --git a/src/pixi/extras/Spine.js b/src/pixi/extras/Spine.js
index 006fb6d..5ee161a 100644
--- a/src/pixi/extras/Spine.js
+++ b/src/pixi/extras/Spine.js
@@ -58,8 +58,8 @@
 	};
 }
 
-PIXI.Spine.constructor = PIXI.Spine;
 PIXI.Spine.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Spine.prototype.constructor = PIXI.Spine;
 
 /*
  * Updates the object transform for rendering
diff --git a/src/pixi/extras/Strip.js b/src/pixi/extras/Strip.js
index d2a6937..1e5ba3b 100644
--- a/src/pixi/extras/Strip.js
+++ b/src/pixi/extras/Strip.js
@@ -66,8 +66,8 @@
 }
 
 // constructor
-PIXI.Strip.constructor = PIXI.Strip;
 PIXI.Strip.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Strip.prototype.constructor = PIXI.Strip;
 
 PIXI.Strip.prototype.setTexture = function(texture)
 {
diff --git a/src/pixi/extras/TilingSprite.js b/src/pixi/extras/TilingSprite.js
index 9a49e1c..2cb17fa 100644
--- a/src/pixi/extras/TilingSprite.js
+++ b/src/pixi/extras/TilingSprite.js
@@ -62,8 +62,8 @@
 }
 
 // constructor
-PIXI.TilingSprite.constructor = PIXI.TilingSprite;
 PIXI.TilingSprite.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.TilingSprite.prototype.constructor = PIXI.TilingSprite;
 
 /**
  * Sets the texture of the tiling sprite
diff --git a/src/pixi/loaders/AssetLoader.js b/src/pixi/loaders/AssetLoader.js
index 7936b83..168a5f8 100644
--- a/src/pixi/loaders/AssetLoader.js
+++ b/src/pixi/loaders/AssetLoader.js
@@ -69,7 +69,7 @@
  */
 
 // constructor
-PIXI.AssetLoader.constructor = PIXI.AssetLoader;
+PIXI.AssetLoader.prototype.constructor = PIXI.AssetLoader;
 
 /**
  * Starts loading the assets sequentially
diff --git a/src/pixi/loaders/BitmapFontLoader.js b/src/pixi/loaders/BitmapFontLoader.js
index af08b83..4afd8aa 100644
--- a/src/pixi/loaders/BitmapFontLoader.js
+++ b/src/pixi/loaders/BitmapFontLoader.js
@@ -58,7 +58,7 @@
 };
 
 // constructor
-PIXI.BitmapFontLoader.constructor = PIXI.BitmapFontLoader;
+PIXI.BitmapFontLoader.prototype.constructor = PIXI.BitmapFontLoader;
 
 /**
  * Loads the XML font data
diff --git a/src/pixi/loaders/ImageLoader.js b/src/pixi/loaders/ImageLoader.js
index 942b009..971c012 100644
--- a/src/pixi/loaders/ImageLoader.js
+++ b/src/pixi/loaders/ImageLoader.js
@@ -27,7 +27,7 @@
 };
 
 // constructor
-PIXI.ImageLoader.constructor = PIXI.ImageLoader;
+PIXI.ImageLoader.prototype.constructor = PIXI.ImageLoader;
 
 /**
  * Loads image or takes it from cache

diff --git a/src/pixi/InteractionManager.js b/src/pixi/InteractionManager.js
index bdbb276..e125dc8 100644
--- a/src/pixi/InteractionManager.js
+++ b/src/pixi/InteractionManager.js
@@ -53,7 +53,7 @@
 }
 
 // constructor
-PIXI.InteractionManager.constructor = PIXI.InteractionManager;
+PIXI.InteractionManager.prototype.constructor = PIXI.InteractionManager;
 
 /**
  * Collects an interactive sprite recursively to have their interactions managed
@@ -618,4 +618,4 @@
 }
 
 // constructor
-PIXI.InteractionData.constructor = PIXI.InteractionData;
+PIXI.InteractionData.prototype.constructor = PIXI.InteractionData;
diff --git a/src/pixi/core/Circle.js b/src/pixi/core/Circle.js
index 6c3433d..a9ceed0 100644
--- a/src/pixi/core/Circle.js
+++ b/src/pixi/core/Circle.js
@@ -69,5 +69,5 @@
     return (dx + dy <= r2);
 }
 
-PIXI.Circle.constructor = PIXI.Circle;
+PIXI.Circle.prototype.constructor = PIXI.Circle;
 
diff --git a/src/pixi/core/Ellipse.js b/src/pixi/core/Ellipse.js
index a0703ad..dd369da 100644
--- a/src/pixi/core/Ellipse.js
+++ b/src/pixi/core/Ellipse.js
@@ -83,5 +83,5 @@
     return new PIXI.Rectangle(this.x, this.y, this.width, this.height);
 }
 
-PIXI.Ellipse.constructor = PIXI.Ellipse;
+PIXI.Ellipse.prototype.constructor = PIXI.Ellipse;
 
diff --git a/src/pixi/core/Point.js b/src/pixi/core/Point.js
index 294a8f8..8520861 100644
--- a/src/pixi/core/Point.js
+++ b/src/pixi/core/Point.js
@@ -39,5 +39,5 @@
 }
 
 // constructor
-PIXI.Point.constructor = PIXI.Point;
+PIXI.Point.prototype.constructor = PIXI.Point;
 
diff --git a/src/pixi/core/Polygon.js b/src/pixi/core/Polygon.js
index 5c1db06..47cf17b 100644
--- a/src/pixi/core/Polygon.js
+++ b/src/pixi/core/Polygon.js
@@ -73,5 +73,5 @@
     return inside;
 }
 
-PIXI.Polygon.constructor = PIXI.Polygon;
+PIXI.Polygon.prototype.constructor = PIXI.Polygon;
 
diff --git a/src/pixi/core/Rectangle.js b/src/pixi/core/Rectangle.js
index 64acf7a..66fb5d6 100644
--- a/src/pixi/core/Rectangle.js
+++ b/src/pixi/core/Rectangle.js
@@ -82,5 +82,5 @@
 }
 
 // constructor
-PIXI.Rectangle.constructor = PIXI.Rectangle;
+PIXI.Rectangle.prototype.constructor = PIXI.Rectangle;
 
diff --git a/src/pixi/display/DisplayObject.js b/src/pixi/display/DisplayObject.js
index 3b51aaf..f8ee024 100644
--- a/src/pixi/display/DisplayObject.js
+++ b/src/pixi/display/DisplayObject.js
@@ -258,7 +258,7 @@
 }
 
 // constructor
-PIXI.DisplayObject.constructor = PIXI.DisplayObject;
+PIXI.DisplayObject.prototype.constructor = PIXI.DisplayObject;
 
 //TODO make visible a getter setter
 /*
diff --git a/src/pixi/display/DisplayObjectContainer.js b/src/pixi/display/DisplayObjectContainer.js
index 4a3a204..649169f 100644
--- a/src/pixi/display/DisplayObjectContainer.js
+++ b/src/pixi/display/DisplayObjectContainer.js
@@ -26,8 +26,8 @@
 }
 
 // constructor
-PIXI.DisplayObjectContainer.constructor = PIXI.DisplayObjectContainer;
 PIXI.DisplayObjectContainer.prototype = Object.create( PIXI.DisplayObject.prototype );
+PIXI.DisplayObjectContainer.prototype.constructor = PIXI.DisplayObjectContainer;
 
 //TODO make visible a getter setter
 /*
diff --git a/src/pixi/display/MovieClip.js b/src/pixi/display/MovieClip.js
index b435ffe..7a77856 100644
--- a/src/pixi/display/MovieClip.js
+++ b/src/pixi/display/MovieClip.js
@@ -69,8 +69,8 @@
 }
 
 // constructor
-PIXI.MovieClip.constructor = PIXI.MovieClip;
 PIXI.MovieClip.prototype = Object.create( PIXI.Sprite.prototype );
+PIXI.MovieClip.prototype.constructor = PIXI.MovieClip;
 
 /**
  * Stops the MovieClip
diff --git a/src/pixi/display/Sprite.js b/src/pixi/display/Sprite.js
index 945331a..0713205 100644
--- a/src/pixi/display/Sprite.js
+++ b/src/pixi/display/Sprite.js
@@ -80,8 +80,8 @@
 }
 
 // constructor
-PIXI.Sprite.constructor = PIXI.Sprite;
 PIXI.Sprite.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Sprite.prototype.constructor = PIXI.Sprite;
 
 /**
  * The width of the sprite, setting this will actually modify the scale to acheive the value set
diff --git a/src/pixi/display/Stage.js b/src/pixi/display/Stage.js
index 447d77a..681c91b 100644
--- a/src/pixi/display/Stage.js
+++ b/src/pixi/display/Stage.js
@@ -65,8 +65,8 @@
 }
 
 // constructor
-PIXI.Stage.constructor = PIXI.Stage;
 PIXI.Stage.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Stage.prototype.constructor = PIXI.Stage;
 
 /*
  * Updates the object transform for rendering
diff --git a/src/pixi/extras/CustomRenderable.js b/src/pixi/extras/CustomRenderable.js
index 7477195..eb0dc5b 100644
--- a/src/pixi/extras/CustomRenderable.js
+++ b/src/pixi/extras/CustomRenderable.js
@@ -17,8 +17,8 @@
 }
 
 // constructor
-PIXI.CustomRenderable.constructor = PIXI.CustomRenderable;
 PIXI.CustomRenderable.prototype = Object.create( PIXI.DisplayObject.prototype );
+PIXI.CustomRenderable.prototype.constructor = PIXI.CustomRenderable;
 
 /**
  * If this object is being rendered by a CanvasRenderer it will call this callback
diff --git a/src/pixi/extras/Rope.js b/src/pixi/extras/Rope.js
index 879fd13..1c057c8 100644
--- a/src/pixi/extras/Rope.js
+++ b/src/pixi/extras/Rope.js
@@ -29,8 +29,8 @@
 
 
 // constructor
-PIXI.Rope.constructor = PIXI.Rope;
 PIXI.Rope.prototype = Object.create( PIXI.Strip.prototype );
+PIXI.Rope.prototype.constructor = PIXI.Rope;
 
 PIXI.Rope.prototype.refresh = function()
 {
diff --git a/src/pixi/extras/Spine.js b/src/pixi/extras/Spine.js
index 006fb6d..5ee161a 100644
--- a/src/pixi/extras/Spine.js
+++ b/src/pixi/extras/Spine.js
@@ -58,8 +58,8 @@
 	};
 }
 
-PIXI.Spine.constructor = PIXI.Spine;
 PIXI.Spine.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Spine.prototype.constructor = PIXI.Spine;
 
 /*
  * Updates the object transform for rendering
diff --git a/src/pixi/extras/Strip.js b/src/pixi/extras/Strip.js
index d2a6937..1e5ba3b 100644
--- a/src/pixi/extras/Strip.js
+++ b/src/pixi/extras/Strip.js
@@ -66,8 +66,8 @@
 }
 
 // constructor
-PIXI.Strip.constructor = PIXI.Strip;
 PIXI.Strip.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Strip.prototype.constructor = PIXI.Strip;
 
 PIXI.Strip.prototype.setTexture = function(texture)
 {
diff --git a/src/pixi/extras/TilingSprite.js b/src/pixi/extras/TilingSprite.js
index 9a49e1c..2cb17fa 100644
--- a/src/pixi/extras/TilingSprite.js
+++ b/src/pixi/extras/TilingSprite.js
@@ -62,8 +62,8 @@
 }
 
 // constructor
-PIXI.TilingSprite.constructor = PIXI.TilingSprite;
 PIXI.TilingSprite.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.TilingSprite.prototype.constructor = PIXI.TilingSprite;
 
 /**
  * Sets the texture of the tiling sprite
diff --git a/src/pixi/loaders/AssetLoader.js b/src/pixi/loaders/AssetLoader.js
index 7936b83..168a5f8 100644
--- a/src/pixi/loaders/AssetLoader.js
+++ b/src/pixi/loaders/AssetLoader.js
@@ -69,7 +69,7 @@
  */
 
 // constructor
-PIXI.AssetLoader.constructor = PIXI.AssetLoader;
+PIXI.AssetLoader.prototype.constructor = PIXI.AssetLoader;
 
 /**
  * Starts loading the assets sequentially
diff --git a/src/pixi/loaders/BitmapFontLoader.js b/src/pixi/loaders/BitmapFontLoader.js
index af08b83..4afd8aa 100644
--- a/src/pixi/loaders/BitmapFontLoader.js
+++ b/src/pixi/loaders/BitmapFontLoader.js
@@ -58,7 +58,7 @@
 };
 
 // constructor
-PIXI.BitmapFontLoader.constructor = PIXI.BitmapFontLoader;
+PIXI.BitmapFontLoader.prototype.constructor = PIXI.BitmapFontLoader;
 
 /**
  * Loads the XML font data
diff --git a/src/pixi/loaders/ImageLoader.js b/src/pixi/loaders/ImageLoader.js
index 942b009..971c012 100644
--- a/src/pixi/loaders/ImageLoader.js
+++ b/src/pixi/loaders/ImageLoader.js
@@ -27,7 +27,7 @@
 };
 
 // constructor
-PIXI.ImageLoader.constructor = PIXI.ImageLoader;
+PIXI.ImageLoader.prototype.constructor = PIXI.ImageLoader;
 
 /**
  * Loads image or takes it from cache
diff --git a/src/pixi/loaders/JsonLoader.js b/src/pixi/loaders/JsonLoader.js
index 1fee06b..1f4ecfe 100644
--- a/src/pixi/loaders/JsonLoader.js
+++ b/src/pixi/loaders/JsonLoader.js
@@ -53,7 +53,7 @@
 };
 
 // constructor
-PIXI.JsonLoader.constructor = PIXI.JsonLoader;
+PIXI.JsonLoader.prototype.constructor = PIXI.JsonLoader;
 
 /**
  * Loads the JSON data

diff --git a/src/pixi/InteractionManager.js b/src/pixi/InteractionManager.js
index bdbb276..e125dc8 100644
--- a/src/pixi/InteractionManager.js
+++ b/src/pixi/InteractionManager.js
@@ -53,7 +53,7 @@
 }
 
 // constructor
-PIXI.InteractionManager.constructor = PIXI.InteractionManager;
+PIXI.InteractionManager.prototype.constructor = PIXI.InteractionManager;
 
 /**
  * Collects an interactive sprite recursively to have their interactions managed
@@ -618,4 +618,4 @@
 }
 
 // constructor
-PIXI.InteractionData.constructor = PIXI.InteractionData;
+PIXI.InteractionData.prototype.constructor = PIXI.InteractionData;
diff --git a/src/pixi/core/Circle.js b/src/pixi/core/Circle.js
index 6c3433d..a9ceed0 100644
--- a/src/pixi/core/Circle.js
+++ b/src/pixi/core/Circle.js
@@ -69,5 +69,5 @@
     return (dx + dy <= r2);
 }
 
-PIXI.Circle.constructor = PIXI.Circle;
+PIXI.Circle.prototype.constructor = PIXI.Circle;
 
diff --git a/src/pixi/core/Ellipse.js b/src/pixi/core/Ellipse.js
index a0703ad..dd369da 100644
--- a/src/pixi/core/Ellipse.js
+++ b/src/pixi/core/Ellipse.js
@@ -83,5 +83,5 @@
     return new PIXI.Rectangle(this.x, this.y, this.width, this.height);
 }
 
-PIXI.Ellipse.constructor = PIXI.Ellipse;
+PIXI.Ellipse.prototype.constructor = PIXI.Ellipse;
 
diff --git a/src/pixi/core/Point.js b/src/pixi/core/Point.js
index 294a8f8..8520861 100644
--- a/src/pixi/core/Point.js
+++ b/src/pixi/core/Point.js
@@ -39,5 +39,5 @@
 }
 
 // constructor
-PIXI.Point.constructor = PIXI.Point;
+PIXI.Point.prototype.constructor = PIXI.Point;
 
diff --git a/src/pixi/core/Polygon.js b/src/pixi/core/Polygon.js
index 5c1db06..47cf17b 100644
--- a/src/pixi/core/Polygon.js
+++ b/src/pixi/core/Polygon.js
@@ -73,5 +73,5 @@
     return inside;
 }
 
-PIXI.Polygon.constructor = PIXI.Polygon;
+PIXI.Polygon.prototype.constructor = PIXI.Polygon;
 
diff --git a/src/pixi/core/Rectangle.js b/src/pixi/core/Rectangle.js
index 64acf7a..66fb5d6 100644
--- a/src/pixi/core/Rectangle.js
+++ b/src/pixi/core/Rectangle.js
@@ -82,5 +82,5 @@
 }
 
 // constructor
-PIXI.Rectangle.constructor = PIXI.Rectangle;
+PIXI.Rectangle.prototype.constructor = PIXI.Rectangle;
 
diff --git a/src/pixi/display/DisplayObject.js b/src/pixi/display/DisplayObject.js
index 3b51aaf..f8ee024 100644
--- a/src/pixi/display/DisplayObject.js
+++ b/src/pixi/display/DisplayObject.js
@@ -258,7 +258,7 @@
 }
 
 // constructor
-PIXI.DisplayObject.constructor = PIXI.DisplayObject;
+PIXI.DisplayObject.prototype.constructor = PIXI.DisplayObject;
 
 //TODO make visible a getter setter
 /*
diff --git a/src/pixi/display/DisplayObjectContainer.js b/src/pixi/display/DisplayObjectContainer.js
index 4a3a204..649169f 100644
--- a/src/pixi/display/DisplayObjectContainer.js
+++ b/src/pixi/display/DisplayObjectContainer.js
@@ -26,8 +26,8 @@
 }
 
 // constructor
-PIXI.DisplayObjectContainer.constructor = PIXI.DisplayObjectContainer;
 PIXI.DisplayObjectContainer.prototype = Object.create( PIXI.DisplayObject.prototype );
+PIXI.DisplayObjectContainer.prototype.constructor = PIXI.DisplayObjectContainer;
 
 //TODO make visible a getter setter
 /*
diff --git a/src/pixi/display/MovieClip.js b/src/pixi/display/MovieClip.js
index b435ffe..7a77856 100644
--- a/src/pixi/display/MovieClip.js
+++ b/src/pixi/display/MovieClip.js
@@ -69,8 +69,8 @@
 }
 
 // constructor
-PIXI.MovieClip.constructor = PIXI.MovieClip;
 PIXI.MovieClip.prototype = Object.create( PIXI.Sprite.prototype );
+PIXI.MovieClip.prototype.constructor = PIXI.MovieClip;
 
 /**
  * Stops the MovieClip
diff --git a/src/pixi/display/Sprite.js b/src/pixi/display/Sprite.js
index 945331a..0713205 100644
--- a/src/pixi/display/Sprite.js
+++ b/src/pixi/display/Sprite.js
@@ -80,8 +80,8 @@
 }
 
 // constructor
-PIXI.Sprite.constructor = PIXI.Sprite;
 PIXI.Sprite.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Sprite.prototype.constructor = PIXI.Sprite;
 
 /**
  * The width of the sprite, setting this will actually modify the scale to acheive the value set
diff --git a/src/pixi/display/Stage.js b/src/pixi/display/Stage.js
index 447d77a..681c91b 100644
--- a/src/pixi/display/Stage.js
+++ b/src/pixi/display/Stage.js
@@ -65,8 +65,8 @@
 }
 
 // constructor
-PIXI.Stage.constructor = PIXI.Stage;
 PIXI.Stage.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Stage.prototype.constructor = PIXI.Stage;
 
 /*
  * Updates the object transform for rendering
diff --git a/src/pixi/extras/CustomRenderable.js b/src/pixi/extras/CustomRenderable.js
index 7477195..eb0dc5b 100644
--- a/src/pixi/extras/CustomRenderable.js
+++ b/src/pixi/extras/CustomRenderable.js
@@ -17,8 +17,8 @@
 }
 
 // constructor
-PIXI.CustomRenderable.constructor = PIXI.CustomRenderable;
 PIXI.CustomRenderable.prototype = Object.create( PIXI.DisplayObject.prototype );
+PIXI.CustomRenderable.prototype.constructor = PIXI.CustomRenderable;
 
 /**
  * If this object is being rendered by a CanvasRenderer it will call this callback
diff --git a/src/pixi/extras/Rope.js b/src/pixi/extras/Rope.js
index 879fd13..1c057c8 100644
--- a/src/pixi/extras/Rope.js
+++ b/src/pixi/extras/Rope.js
@@ -29,8 +29,8 @@
 
 
 // constructor
-PIXI.Rope.constructor = PIXI.Rope;
 PIXI.Rope.prototype = Object.create( PIXI.Strip.prototype );
+PIXI.Rope.prototype.constructor = PIXI.Rope;
 
 PIXI.Rope.prototype.refresh = function()
 {
diff --git a/src/pixi/extras/Spine.js b/src/pixi/extras/Spine.js
index 006fb6d..5ee161a 100644
--- a/src/pixi/extras/Spine.js
+++ b/src/pixi/extras/Spine.js
@@ -58,8 +58,8 @@
 	};
 }
 
-PIXI.Spine.constructor = PIXI.Spine;
 PIXI.Spine.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Spine.prototype.constructor = PIXI.Spine;
 
 /*
  * Updates the object transform for rendering
diff --git a/src/pixi/extras/Strip.js b/src/pixi/extras/Strip.js
index d2a6937..1e5ba3b 100644
--- a/src/pixi/extras/Strip.js
+++ b/src/pixi/extras/Strip.js
@@ -66,8 +66,8 @@
 }
 
 // constructor
-PIXI.Strip.constructor = PIXI.Strip;
 PIXI.Strip.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Strip.prototype.constructor = PIXI.Strip;
 
 PIXI.Strip.prototype.setTexture = function(texture)
 {
diff --git a/src/pixi/extras/TilingSprite.js b/src/pixi/extras/TilingSprite.js
index 9a49e1c..2cb17fa 100644
--- a/src/pixi/extras/TilingSprite.js
+++ b/src/pixi/extras/TilingSprite.js
@@ -62,8 +62,8 @@
 }
 
 // constructor
-PIXI.TilingSprite.constructor = PIXI.TilingSprite;
 PIXI.TilingSprite.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.TilingSprite.prototype.constructor = PIXI.TilingSprite;
 
 /**
  * Sets the texture of the tiling sprite
diff --git a/src/pixi/loaders/AssetLoader.js b/src/pixi/loaders/AssetLoader.js
index 7936b83..168a5f8 100644
--- a/src/pixi/loaders/AssetLoader.js
+++ b/src/pixi/loaders/AssetLoader.js
@@ -69,7 +69,7 @@
  */
 
 // constructor
-PIXI.AssetLoader.constructor = PIXI.AssetLoader;
+PIXI.AssetLoader.prototype.constructor = PIXI.AssetLoader;
 
 /**
  * Starts loading the assets sequentially
diff --git a/src/pixi/loaders/BitmapFontLoader.js b/src/pixi/loaders/BitmapFontLoader.js
index af08b83..4afd8aa 100644
--- a/src/pixi/loaders/BitmapFontLoader.js
+++ b/src/pixi/loaders/BitmapFontLoader.js
@@ -58,7 +58,7 @@
 };
 
 // constructor
-PIXI.BitmapFontLoader.constructor = PIXI.BitmapFontLoader;
+PIXI.BitmapFontLoader.prototype.constructor = PIXI.BitmapFontLoader;
 
 /**
  * Loads the XML font data
diff --git a/src/pixi/loaders/ImageLoader.js b/src/pixi/loaders/ImageLoader.js
index 942b009..971c012 100644
--- a/src/pixi/loaders/ImageLoader.js
+++ b/src/pixi/loaders/ImageLoader.js
@@ -27,7 +27,7 @@
 };
 
 // constructor
-PIXI.ImageLoader.constructor = PIXI.ImageLoader;
+PIXI.ImageLoader.prototype.constructor = PIXI.ImageLoader;
 
 /**
  * Loads image or takes it from cache
diff --git a/src/pixi/loaders/JsonLoader.js b/src/pixi/loaders/JsonLoader.js
index 1fee06b..1f4ecfe 100644
--- a/src/pixi/loaders/JsonLoader.js
+++ b/src/pixi/loaders/JsonLoader.js
@@ -53,7 +53,7 @@
 };
 
 // constructor
-PIXI.JsonLoader.constructor = PIXI.JsonLoader;
+PIXI.JsonLoader.prototype.constructor = PIXI.JsonLoader;
 
 /**
  * Loads the JSON data
diff --git a/src/pixi/loaders/SpineLoader.js b/src/pixi/loaders/SpineLoader.js
index ce32257..f5e16b0 100644
--- a/src/pixi/loaders/SpineLoader.js
+++ b/src/pixi/loaders/SpineLoader.js
@@ -51,7 +51,7 @@
 	this.loaded = false;
 }
 
-PIXI.SpineLoader.constructor = PIXI.SpineLoader;
+PIXI.SpineLoader.prototype.constructor = PIXI.SpineLoader;
 
 /**
  * Loads the JSON data

diff --git a/src/pixi/InteractionManager.js b/src/pixi/InteractionManager.js
index bdbb276..e125dc8 100644
--- a/src/pixi/InteractionManager.js
+++ b/src/pixi/InteractionManager.js
@@ -53,7 +53,7 @@
 }
 
 // constructor
-PIXI.InteractionManager.constructor = PIXI.InteractionManager;
+PIXI.InteractionManager.prototype.constructor = PIXI.InteractionManager;
 
 /**
  * Collects an interactive sprite recursively to have their interactions managed
@@ -618,4 +618,4 @@
 }
 
 // constructor
-PIXI.InteractionData.constructor = PIXI.InteractionData;
+PIXI.InteractionData.prototype.constructor = PIXI.InteractionData;
diff --git a/src/pixi/core/Circle.js b/src/pixi/core/Circle.js
index 6c3433d..a9ceed0 100644
--- a/src/pixi/core/Circle.js
+++ b/src/pixi/core/Circle.js
@@ -69,5 +69,5 @@
     return (dx + dy <= r2);
 }
 
-PIXI.Circle.constructor = PIXI.Circle;
+PIXI.Circle.prototype.constructor = PIXI.Circle;
 
diff --git a/src/pixi/core/Ellipse.js b/src/pixi/core/Ellipse.js
index a0703ad..dd369da 100644
--- a/src/pixi/core/Ellipse.js
+++ b/src/pixi/core/Ellipse.js
@@ -83,5 +83,5 @@
     return new PIXI.Rectangle(this.x, this.y, this.width, this.height);
 }
 
-PIXI.Ellipse.constructor = PIXI.Ellipse;
+PIXI.Ellipse.prototype.constructor = PIXI.Ellipse;
 
diff --git a/src/pixi/core/Point.js b/src/pixi/core/Point.js
index 294a8f8..8520861 100644
--- a/src/pixi/core/Point.js
+++ b/src/pixi/core/Point.js
@@ -39,5 +39,5 @@
 }
 
 // constructor
-PIXI.Point.constructor = PIXI.Point;
+PIXI.Point.prototype.constructor = PIXI.Point;
 
diff --git a/src/pixi/core/Polygon.js b/src/pixi/core/Polygon.js
index 5c1db06..47cf17b 100644
--- a/src/pixi/core/Polygon.js
+++ b/src/pixi/core/Polygon.js
@@ -73,5 +73,5 @@
     return inside;
 }
 
-PIXI.Polygon.constructor = PIXI.Polygon;
+PIXI.Polygon.prototype.constructor = PIXI.Polygon;
 
diff --git a/src/pixi/core/Rectangle.js b/src/pixi/core/Rectangle.js
index 64acf7a..66fb5d6 100644
--- a/src/pixi/core/Rectangle.js
+++ b/src/pixi/core/Rectangle.js
@@ -82,5 +82,5 @@
 }
 
 // constructor
-PIXI.Rectangle.constructor = PIXI.Rectangle;
+PIXI.Rectangle.prototype.constructor = PIXI.Rectangle;
 
diff --git a/src/pixi/display/DisplayObject.js b/src/pixi/display/DisplayObject.js
index 3b51aaf..f8ee024 100644
--- a/src/pixi/display/DisplayObject.js
+++ b/src/pixi/display/DisplayObject.js
@@ -258,7 +258,7 @@
 }
 
 // constructor
-PIXI.DisplayObject.constructor = PIXI.DisplayObject;
+PIXI.DisplayObject.prototype.constructor = PIXI.DisplayObject;
 
 //TODO make visible a getter setter
 /*
diff --git a/src/pixi/display/DisplayObjectContainer.js b/src/pixi/display/DisplayObjectContainer.js
index 4a3a204..649169f 100644
--- a/src/pixi/display/DisplayObjectContainer.js
+++ b/src/pixi/display/DisplayObjectContainer.js
@@ -26,8 +26,8 @@
 }
 
 // constructor
-PIXI.DisplayObjectContainer.constructor = PIXI.DisplayObjectContainer;
 PIXI.DisplayObjectContainer.prototype = Object.create( PIXI.DisplayObject.prototype );
+PIXI.DisplayObjectContainer.prototype.constructor = PIXI.DisplayObjectContainer;
 
 //TODO make visible a getter setter
 /*
diff --git a/src/pixi/display/MovieClip.js b/src/pixi/display/MovieClip.js
index b435ffe..7a77856 100644
--- a/src/pixi/display/MovieClip.js
+++ b/src/pixi/display/MovieClip.js
@@ -69,8 +69,8 @@
 }
 
 // constructor
-PIXI.MovieClip.constructor = PIXI.MovieClip;
 PIXI.MovieClip.prototype = Object.create( PIXI.Sprite.prototype );
+PIXI.MovieClip.prototype.constructor = PIXI.MovieClip;
 
 /**
  * Stops the MovieClip
diff --git a/src/pixi/display/Sprite.js b/src/pixi/display/Sprite.js
index 945331a..0713205 100644
--- a/src/pixi/display/Sprite.js
+++ b/src/pixi/display/Sprite.js
@@ -80,8 +80,8 @@
 }
 
 // constructor
-PIXI.Sprite.constructor = PIXI.Sprite;
 PIXI.Sprite.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Sprite.prototype.constructor = PIXI.Sprite;
 
 /**
  * The width of the sprite, setting this will actually modify the scale to acheive the value set
diff --git a/src/pixi/display/Stage.js b/src/pixi/display/Stage.js
index 447d77a..681c91b 100644
--- a/src/pixi/display/Stage.js
+++ b/src/pixi/display/Stage.js
@@ -65,8 +65,8 @@
 }
 
 // constructor
-PIXI.Stage.constructor = PIXI.Stage;
 PIXI.Stage.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Stage.prototype.constructor = PIXI.Stage;
 
 /*
  * Updates the object transform for rendering
diff --git a/src/pixi/extras/CustomRenderable.js b/src/pixi/extras/CustomRenderable.js
index 7477195..eb0dc5b 100644
--- a/src/pixi/extras/CustomRenderable.js
+++ b/src/pixi/extras/CustomRenderable.js
@@ -17,8 +17,8 @@
 }
 
 // constructor
-PIXI.CustomRenderable.constructor = PIXI.CustomRenderable;
 PIXI.CustomRenderable.prototype = Object.create( PIXI.DisplayObject.prototype );
+PIXI.CustomRenderable.prototype.constructor = PIXI.CustomRenderable;
 
 /**
  * If this object is being rendered by a CanvasRenderer it will call this callback
diff --git a/src/pixi/extras/Rope.js b/src/pixi/extras/Rope.js
index 879fd13..1c057c8 100644
--- a/src/pixi/extras/Rope.js
+++ b/src/pixi/extras/Rope.js
@@ -29,8 +29,8 @@
 
 
 // constructor
-PIXI.Rope.constructor = PIXI.Rope;
 PIXI.Rope.prototype = Object.create( PIXI.Strip.prototype );
+PIXI.Rope.prototype.constructor = PIXI.Rope;
 
 PIXI.Rope.prototype.refresh = function()
 {
diff --git a/src/pixi/extras/Spine.js b/src/pixi/extras/Spine.js
index 006fb6d..5ee161a 100644
--- a/src/pixi/extras/Spine.js
+++ b/src/pixi/extras/Spine.js
@@ -58,8 +58,8 @@
 	};
 }
 
-PIXI.Spine.constructor = PIXI.Spine;
 PIXI.Spine.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Spine.prototype.constructor = PIXI.Spine;
 
 /*
  * Updates the object transform for rendering
diff --git a/src/pixi/extras/Strip.js b/src/pixi/extras/Strip.js
index d2a6937..1e5ba3b 100644
--- a/src/pixi/extras/Strip.js
+++ b/src/pixi/extras/Strip.js
@@ -66,8 +66,8 @@
 }
 
 // constructor
-PIXI.Strip.constructor = PIXI.Strip;
 PIXI.Strip.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Strip.prototype.constructor = PIXI.Strip;
 
 PIXI.Strip.prototype.setTexture = function(texture)
 {
diff --git a/src/pixi/extras/TilingSprite.js b/src/pixi/extras/TilingSprite.js
index 9a49e1c..2cb17fa 100644
--- a/src/pixi/extras/TilingSprite.js
+++ b/src/pixi/extras/TilingSprite.js
@@ -62,8 +62,8 @@
 }
 
 // constructor
-PIXI.TilingSprite.constructor = PIXI.TilingSprite;
 PIXI.TilingSprite.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.TilingSprite.prototype.constructor = PIXI.TilingSprite;
 
 /**
  * Sets the texture of the tiling sprite
diff --git a/src/pixi/loaders/AssetLoader.js b/src/pixi/loaders/AssetLoader.js
index 7936b83..168a5f8 100644
--- a/src/pixi/loaders/AssetLoader.js
+++ b/src/pixi/loaders/AssetLoader.js
@@ -69,7 +69,7 @@
  */
 
 // constructor
-PIXI.AssetLoader.constructor = PIXI.AssetLoader;
+PIXI.AssetLoader.prototype.constructor = PIXI.AssetLoader;
 
 /**
  * Starts loading the assets sequentially
diff --git a/src/pixi/loaders/BitmapFontLoader.js b/src/pixi/loaders/BitmapFontLoader.js
index af08b83..4afd8aa 100644
--- a/src/pixi/loaders/BitmapFontLoader.js
+++ b/src/pixi/loaders/BitmapFontLoader.js
@@ -58,7 +58,7 @@
 };
 
 // constructor
-PIXI.BitmapFontLoader.constructor = PIXI.BitmapFontLoader;
+PIXI.BitmapFontLoader.prototype.constructor = PIXI.BitmapFontLoader;
 
 /**
  * Loads the XML font data
diff --git a/src/pixi/loaders/ImageLoader.js b/src/pixi/loaders/ImageLoader.js
index 942b009..971c012 100644
--- a/src/pixi/loaders/ImageLoader.js
+++ b/src/pixi/loaders/ImageLoader.js
@@ -27,7 +27,7 @@
 };
 
 // constructor
-PIXI.ImageLoader.constructor = PIXI.ImageLoader;
+PIXI.ImageLoader.prototype.constructor = PIXI.ImageLoader;
 
 /**
  * Loads image or takes it from cache
diff --git a/src/pixi/loaders/JsonLoader.js b/src/pixi/loaders/JsonLoader.js
index 1fee06b..1f4ecfe 100644
--- a/src/pixi/loaders/JsonLoader.js
+++ b/src/pixi/loaders/JsonLoader.js
@@ -53,7 +53,7 @@
 };
 
 // constructor
-PIXI.JsonLoader.constructor = PIXI.JsonLoader;
+PIXI.JsonLoader.prototype.constructor = PIXI.JsonLoader;
 
 /**
  * Loads the JSON data
diff --git a/src/pixi/loaders/SpineLoader.js b/src/pixi/loaders/SpineLoader.js
index ce32257..f5e16b0 100644
--- a/src/pixi/loaders/SpineLoader.js
+++ b/src/pixi/loaders/SpineLoader.js
@@ -51,7 +51,7 @@
 	this.loaded = false;
 }
 
-PIXI.SpineLoader.constructor = PIXI.SpineLoader;
+PIXI.SpineLoader.prototype.constructor = PIXI.SpineLoader;
 
 /**
  * Loads the JSON data
diff --git a/src/pixi/loaders/SpriteSheetLoader.js b/src/pixi/loaders/SpriteSheetLoader.js
index 5495f57..169fb70 100644
--- a/src/pixi/loaders/SpriteSheetLoader.js
+++ b/src/pixi/loaders/SpriteSheetLoader.js
@@ -69,7 +69,7 @@
 };
 
 // constructor
-PIXI.SpriteSheetLoader.constructor = PIXI.SpriteSheetLoader;
+PIXI.SpriteSheetLoader.prototype.constructor = PIXI.SpriteSheetLoader;
 
 /**
  * This will begin loading the JSON file

diff --git a/src/pixi/InteractionManager.js b/src/pixi/InteractionManager.js
index bdbb276..e125dc8 100644
--- a/src/pixi/InteractionManager.js
+++ b/src/pixi/InteractionManager.js
@@ -53,7 +53,7 @@
 }
 
 // constructor
-PIXI.InteractionManager.constructor = PIXI.InteractionManager;
+PIXI.InteractionManager.prototype.constructor = PIXI.InteractionManager;
 
 /**
  * Collects an interactive sprite recursively to have their interactions managed
@@ -618,4 +618,4 @@
 }
 
 // constructor
-PIXI.InteractionData.constructor = PIXI.InteractionData;
+PIXI.InteractionData.prototype.constructor = PIXI.InteractionData;
diff --git a/src/pixi/core/Circle.js b/src/pixi/core/Circle.js
index 6c3433d..a9ceed0 100644
--- a/src/pixi/core/Circle.js
+++ b/src/pixi/core/Circle.js
@@ -69,5 +69,5 @@
     return (dx + dy <= r2);
 }
 
-PIXI.Circle.constructor = PIXI.Circle;
+PIXI.Circle.prototype.constructor = PIXI.Circle;
 
diff --git a/src/pixi/core/Ellipse.js b/src/pixi/core/Ellipse.js
index a0703ad..dd369da 100644
--- a/src/pixi/core/Ellipse.js
+++ b/src/pixi/core/Ellipse.js
@@ -83,5 +83,5 @@
     return new PIXI.Rectangle(this.x, this.y, this.width, this.height);
 }
 
-PIXI.Ellipse.constructor = PIXI.Ellipse;
+PIXI.Ellipse.prototype.constructor = PIXI.Ellipse;
 
diff --git a/src/pixi/core/Point.js b/src/pixi/core/Point.js
index 294a8f8..8520861 100644
--- a/src/pixi/core/Point.js
+++ b/src/pixi/core/Point.js
@@ -39,5 +39,5 @@
 }
 
 // constructor
-PIXI.Point.constructor = PIXI.Point;
+PIXI.Point.prototype.constructor = PIXI.Point;
 
diff --git a/src/pixi/core/Polygon.js b/src/pixi/core/Polygon.js
index 5c1db06..47cf17b 100644
--- a/src/pixi/core/Polygon.js
+++ b/src/pixi/core/Polygon.js
@@ -73,5 +73,5 @@
     return inside;
 }
 
-PIXI.Polygon.constructor = PIXI.Polygon;
+PIXI.Polygon.prototype.constructor = PIXI.Polygon;
 
diff --git a/src/pixi/core/Rectangle.js b/src/pixi/core/Rectangle.js
index 64acf7a..66fb5d6 100644
--- a/src/pixi/core/Rectangle.js
+++ b/src/pixi/core/Rectangle.js
@@ -82,5 +82,5 @@
 }
 
 // constructor
-PIXI.Rectangle.constructor = PIXI.Rectangle;
+PIXI.Rectangle.prototype.constructor = PIXI.Rectangle;
 
diff --git a/src/pixi/display/DisplayObject.js b/src/pixi/display/DisplayObject.js
index 3b51aaf..f8ee024 100644
--- a/src/pixi/display/DisplayObject.js
+++ b/src/pixi/display/DisplayObject.js
@@ -258,7 +258,7 @@
 }
 
 // constructor
-PIXI.DisplayObject.constructor = PIXI.DisplayObject;
+PIXI.DisplayObject.prototype.constructor = PIXI.DisplayObject;
 
 //TODO make visible a getter setter
 /*
diff --git a/src/pixi/display/DisplayObjectContainer.js b/src/pixi/display/DisplayObjectContainer.js
index 4a3a204..649169f 100644
--- a/src/pixi/display/DisplayObjectContainer.js
+++ b/src/pixi/display/DisplayObjectContainer.js
@@ -26,8 +26,8 @@
 }
 
 // constructor
-PIXI.DisplayObjectContainer.constructor = PIXI.DisplayObjectContainer;
 PIXI.DisplayObjectContainer.prototype = Object.create( PIXI.DisplayObject.prototype );
+PIXI.DisplayObjectContainer.prototype.constructor = PIXI.DisplayObjectContainer;
 
 //TODO make visible a getter setter
 /*
diff --git a/src/pixi/display/MovieClip.js b/src/pixi/display/MovieClip.js
index b435ffe..7a77856 100644
--- a/src/pixi/display/MovieClip.js
+++ b/src/pixi/display/MovieClip.js
@@ -69,8 +69,8 @@
 }
 
 // constructor
-PIXI.MovieClip.constructor = PIXI.MovieClip;
 PIXI.MovieClip.prototype = Object.create( PIXI.Sprite.prototype );
+PIXI.MovieClip.prototype.constructor = PIXI.MovieClip;
 
 /**
  * Stops the MovieClip
diff --git a/src/pixi/display/Sprite.js b/src/pixi/display/Sprite.js
index 945331a..0713205 100644
--- a/src/pixi/display/Sprite.js
+++ b/src/pixi/display/Sprite.js
@@ -80,8 +80,8 @@
 }
 
 // constructor
-PIXI.Sprite.constructor = PIXI.Sprite;
 PIXI.Sprite.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Sprite.prototype.constructor = PIXI.Sprite;
 
 /**
  * The width of the sprite, setting this will actually modify the scale to acheive the value set
diff --git a/src/pixi/display/Stage.js b/src/pixi/display/Stage.js
index 447d77a..681c91b 100644
--- a/src/pixi/display/Stage.js
+++ b/src/pixi/display/Stage.js
@@ -65,8 +65,8 @@
 }
 
 // constructor
-PIXI.Stage.constructor = PIXI.Stage;
 PIXI.Stage.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Stage.prototype.constructor = PIXI.Stage;
 
 /*
  * Updates the object transform for rendering
diff --git a/src/pixi/extras/CustomRenderable.js b/src/pixi/extras/CustomRenderable.js
index 7477195..eb0dc5b 100644
--- a/src/pixi/extras/CustomRenderable.js
+++ b/src/pixi/extras/CustomRenderable.js
@@ -17,8 +17,8 @@
 }
 
 // constructor
-PIXI.CustomRenderable.constructor = PIXI.CustomRenderable;
 PIXI.CustomRenderable.prototype = Object.create( PIXI.DisplayObject.prototype );
+PIXI.CustomRenderable.prototype.constructor = PIXI.CustomRenderable;
 
 /**
  * If this object is being rendered by a CanvasRenderer it will call this callback
diff --git a/src/pixi/extras/Rope.js b/src/pixi/extras/Rope.js
index 879fd13..1c057c8 100644
--- a/src/pixi/extras/Rope.js
+++ b/src/pixi/extras/Rope.js
@@ -29,8 +29,8 @@
 
 
 // constructor
-PIXI.Rope.constructor = PIXI.Rope;
 PIXI.Rope.prototype = Object.create( PIXI.Strip.prototype );
+PIXI.Rope.prototype.constructor = PIXI.Rope;
 
 PIXI.Rope.prototype.refresh = function()
 {
diff --git a/src/pixi/extras/Spine.js b/src/pixi/extras/Spine.js
index 006fb6d..5ee161a 100644
--- a/src/pixi/extras/Spine.js
+++ b/src/pixi/extras/Spine.js
@@ -58,8 +58,8 @@
 	};
 }
 
-PIXI.Spine.constructor = PIXI.Spine;
 PIXI.Spine.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Spine.prototype.constructor = PIXI.Spine;
 
 /*
  * Updates the object transform for rendering
diff --git a/src/pixi/extras/Strip.js b/src/pixi/extras/Strip.js
index d2a6937..1e5ba3b 100644
--- a/src/pixi/extras/Strip.js
+++ b/src/pixi/extras/Strip.js
@@ -66,8 +66,8 @@
 }
 
 // constructor
-PIXI.Strip.constructor = PIXI.Strip;
 PIXI.Strip.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Strip.prototype.constructor = PIXI.Strip;
 
 PIXI.Strip.prototype.setTexture = function(texture)
 {
diff --git a/src/pixi/extras/TilingSprite.js b/src/pixi/extras/TilingSprite.js
index 9a49e1c..2cb17fa 100644
--- a/src/pixi/extras/TilingSprite.js
+++ b/src/pixi/extras/TilingSprite.js
@@ -62,8 +62,8 @@
 }
 
 // constructor
-PIXI.TilingSprite.constructor = PIXI.TilingSprite;
 PIXI.TilingSprite.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.TilingSprite.prototype.constructor = PIXI.TilingSprite;
 
 /**
  * Sets the texture of the tiling sprite
diff --git a/src/pixi/loaders/AssetLoader.js b/src/pixi/loaders/AssetLoader.js
index 7936b83..168a5f8 100644
--- a/src/pixi/loaders/AssetLoader.js
+++ b/src/pixi/loaders/AssetLoader.js
@@ -69,7 +69,7 @@
  */
 
 // constructor
-PIXI.AssetLoader.constructor = PIXI.AssetLoader;
+PIXI.AssetLoader.prototype.constructor = PIXI.AssetLoader;
 
 /**
  * Starts loading the assets sequentially
diff --git a/src/pixi/loaders/BitmapFontLoader.js b/src/pixi/loaders/BitmapFontLoader.js
index af08b83..4afd8aa 100644
--- a/src/pixi/loaders/BitmapFontLoader.js
+++ b/src/pixi/loaders/BitmapFontLoader.js
@@ -58,7 +58,7 @@
 };
 
 // constructor
-PIXI.BitmapFontLoader.constructor = PIXI.BitmapFontLoader;
+PIXI.BitmapFontLoader.prototype.constructor = PIXI.BitmapFontLoader;
 
 /**
  * Loads the XML font data
diff --git a/src/pixi/loaders/ImageLoader.js b/src/pixi/loaders/ImageLoader.js
index 942b009..971c012 100644
--- a/src/pixi/loaders/ImageLoader.js
+++ b/src/pixi/loaders/ImageLoader.js
@@ -27,7 +27,7 @@
 };
 
 // constructor
-PIXI.ImageLoader.constructor = PIXI.ImageLoader;
+PIXI.ImageLoader.prototype.constructor = PIXI.ImageLoader;
 
 /**
  * Loads image or takes it from cache
diff --git a/src/pixi/loaders/JsonLoader.js b/src/pixi/loaders/JsonLoader.js
index 1fee06b..1f4ecfe 100644
--- a/src/pixi/loaders/JsonLoader.js
+++ b/src/pixi/loaders/JsonLoader.js
@@ -53,7 +53,7 @@
 };
 
 // constructor
-PIXI.JsonLoader.constructor = PIXI.JsonLoader;
+PIXI.JsonLoader.prototype.constructor = PIXI.JsonLoader;
 
 /**
  * Loads the JSON data
diff --git a/src/pixi/loaders/SpineLoader.js b/src/pixi/loaders/SpineLoader.js
index ce32257..f5e16b0 100644
--- a/src/pixi/loaders/SpineLoader.js
+++ b/src/pixi/loaders/SpineLoader.js
@@ -51,7 +51,7 @@
 	this.loaded = false;
 }
 
-PIXI.SpineLoader.constructor = PIXI.SpineLoader;
+PIXI.SpineLoader.prototype.constructor = PIXI.SpineLoader;
 
 /**
  * Loads the JSON data
diff --git a/src/pixi/loaders/SpriteSheetLoader.js b/src/pixi/loaders/SpriteSheetLoader.js
index 5495f57..169fb70 100644
--- a/src/pixi/loaders/SpriteSheetLoader.js
+++ b/src/pixi/loaders/SpriteSheetLoader.js
@@ -69,7 +69,7 @@
 };
 
 // constructor
-PIXI.SpriteSheetLoader.constructor = PIXI.SpriteSheetLoader;
+PIXI.SpriteSheetLoader.prototype.constructor = PIXI.SpriteSheetLoader;
 
 /**
  * This will begin loading the JSON file
diff --git a/src/pixi/primitives/Graphics.js b/src/pixi/primitives/Graphics.js
index 768fede..7a80553 100644
--- a/src/pixi/primitives/Graphics.js
+++ b/src/pixi/primitives/Graphics.js
@@ -62,8 +62,8 @@
 }
 
 // constructor
-PIXI.Graphics.constructor = PIXI.Graphics;
 PIXI.Graphics.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Graphics.prototype.constructor = PIXI.Graphics;
 
 /**
  * Specifies a line style used for subsequent calls to Graphics methods such as the lineTo() method or the drawCircle() method.

diff --git a/src/pixi/InteractionManager.js b/src/pixi/InteractionManager.js
index bdbb276..e125dc8 100644
--- a/src/pixi/InteractionManager.js
+++ b/src/pixi/InteractionManager.js
@@ -53,7 +53,7 @@
 }
 
 // constructor
-PIXI.InteractionManager.constructor = PIXI.InteractionManager;
+PIXI.InteractionManager.prototype.constructor = PIXI.InteractionManager;
 
 /**
  * Collects an interactive sprite recursively to have their interactions managed
@@ -618,4 +618,4 @@
 }
 
 // constructor
-PIXI.InteractionData.constructor = PIXI.InteractionData;
+PIXI.InteractionData.prototype.constructor = PIXI.InteractionData;
diff --git a/src/pixi/core/Circle.js b/src/pixi/core/Circle.js
index 6c3433d..a9ceed0 100644
--- a/src/pixi/core/Circle.js
+++ b/src/pixi/core/Circle.js
@@ -69,5 +69,5 @@
     return (dx + dy <= r2);
 }
 
-PIXI.Circle.constructor = PIXI.Circle;
+PIXI.Circle.prototype.constructor = PIXI.Circle;
 
diff --git a/src/pixi/core/Ellipse.js b/src/pixi/core/Ellipse.js
index a0703ad..dd369da 100644
--- a/src/pixi/core/Ellipse.js
+++ b/src/pixi/core/Ellipse.js
@@ -83,5 +83,5 @@
     return new PIXI.Rectangle(this.x, this.y, this.width, this.height);
 }
 
-PIXI.Ellipse.constructor = PIXI.Ellipse;
+PIXI.Ellipse.prototype.constructor = PIXI.Ellipse;
 
diff --git a/src/pixi/core/Point.js b/src/pixi/core/Point.js
index 294a8f8..8520861 100644
--- a/src/pixi/core/Point.js
+++ b/src/pixi/core/Point.js
@@ -39,5 +39,5 @@
 }
 
 // constructor
-PIXI.Point.constructor = PIXI.Point;
+PIXI.Point.prototype.constructor = PIXI.Point;
 
diff --git a/src/pixi/core/Polygon.js b/src/pixi/core/Polygon.js
index 5c1db06..47cf17b 100644
--- a/src/pixi/core/Polygon.js
+++ b/src/pixi/core/Polygon.js
@@ -73,5 +73,5 @@
     return inside;
 }
 
-PIXI.Polygon.constructor = PIXI.Polygon;
+PIXI.Polygon.prototype.constructor = PIXI.Polygon;
 
diff --git a/src/pixi/core/Rectangle.js b/src/pixi/core/Rectangle.js
index 64acf7a..66fb5d6 100644
--- a/src/pixi/core/Rectangle.js
+++ b/src/pixi/core/Rectangle.js
@@ -82,5 +82,5 @@
 }
 
 // constructor
-PIXI.Rectangle.constructor = PIXI.Rectangle;
+PIXI.Rectangle.prototype.constructor = PIXI.Rectangle;
 
diff --git a/src/pixi/display/DisplayObject.js b/src/pixi/display/DisplayObject.js
index 3b51aaf..f8ee024 100644
--- a/src/pixi/display/DisplayObject.js
+++ b/src/pixi/display/DisplayObject.js
@@ -258,7 +258,7 @@
 }
 
 // constructor
-PIXI.DisplayObject.constructor = PIXI.DisplayObject;
+PIXI.DisplayObject.prototype.constructor = PIXI.DisplayObject;
 
 //TODO make visible a getter setter
 /*
diff --git a/src/pixi/display/DisplayObjectContainer.js b/src/pixi/display/DisplayObjectContainer.js
index 4a3a204..649169f 100644
--- a/src/pixi/display/DisplayObjectContainer.js
+++ b/src/pixi/display/DisplayObjectContainer.js
@@ -26,8 +26,8 @@
 }
 
 // constructor
-PIXI.DisplayObjectContainer.constructor = PIXI.DisplayObjectContainer;
 PIXI.DisplayObjectContainer.prototype = Object.create( PIXI.DisplayObject.prototype );
+PIXI.DisplayObjectContainer.prototype.constructor = PIXI.DisplayObjectContainer;
 
 //TODO make visible a getter setter
 /*
diff --git a/src/pixi/display/MovieClip.js b/src/pixi/display/MovieClip.js
index b435ffe..7a77856 100644
--- a/src/pixi/display/MovieClip.js
+++ b/src/pixi/display/MovieClip.js
@@ -69,8 +69,8 @@
 }
 
 // constructor
-PIXI.MovieClip.constructor = PIXI.MovieClip;
 PIXI.MovieClip.prototype = Object.create( PIXI.Sprite.prototype );
+PIXI.MovieClip.prototype.constructor = PIXI.MovieClip;
 
 /**
  * Stops the MovieClip
diff --git a/src/pixi/display/Sprite.js b/src/pixi/display/Sprite.js
index 945331a..0713205 100644
--- a/src/pixi/display/Sprite.js
+++ b/src/pixi/display/Sprite.js
@@ -80,8 +80,8 @@
 }
 
 // constructor
-PIXI.Sprite.constructor = PIXI.Sprite;
 PIXI.Sprite.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Sprite.prototype.constructor = PIXI.Sprite;
 
 /**
  * The width of the sprite, setting this will actually modify the scale to acheive the value set
diff --git a/src/pixi/display/Stage.js b/src/pixi/display/Stage.js
index 447d77a..681c91b 100644
--- a/src/pixi/display/Stage.js
+++ b/src/pixi/display/Stage.js
@@ -65,8 +65,8 @@
 }
 
 // constructor
-PIXI.Stage.constructor = PIXI.Stage;
 PIXI.Stage.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Stage.prototype.constructor = PIXI.Stage;
 
 /*
  * Updates the object transform for rendering
diff --git a/src/pixi/extras/CustomRenderable.js b/src/pixi/extras/CustomRenderable.js
index 7477195..eb0dc5b 100644
--- a/src/pixi/extras/CustomRenderable.js
+++ b/src/pixi/extras/CustomRenderable.js
@@ -17,8 +17,8 @@
 }
 
 // constructor
-PIXI.CustomRenderable.constructor = PIXI.CustomRenderable;
 PIXI.CustomRenderable.prototype = Object.create( PIXI.DisplayObject.prototype );
+PIXI.CustomRenderable.prototype.constructor = PIXI.CustomRenderable;
 
 /**
  * If this object is being rendered by a CanvasRenderer it will call this callback
diff --git a/src/pixi/extras/Rope.js b/src/pixi/extras/Rope.js
index 879fd13..1c057c8 100644
--- a/src/pixi/extras/Rope.js
+++ b/src/pixi/extras/Rope.js
@@ -29,8 +29,8 @@
 
 
 // constructor
-PIXI.Rope.constructor = PIXI.Rope;
 PIXI.Rope.prototype = Object.create( PIXI.Strip.prototype );
+PIXI.Rope.prototype.constructor = PIXI.Rope;
 
 PIXI.Rope.prototype.refresh = function()
 {
diff --git a/src/pixi/extras/Spine.js b/src/pixi/extras/Spine.js
index 006fb6d..5ee161a 100644
--- a/src/pixi/extras/Spine.js
+++ b/src/pixi/extras/Spine.js
@@ -58,8 +58,8 @@
 	};
 }
 
-PIXI.Spine.constructor = PIXI.Spine;
 PIXI.Spine.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Spine.prototype.constructor = PIXI.Spine;
 
 /*
  * Updates the object transform for rendering
diff --git a/src/pixi/extras/Strip.js b/src/pixi/extras/Strip.js
index d2a6937..1e5ba3b 100644
--- a/src/pixi/extras/Strip.js
+++ b/src/pixi/extras/Strip.js
@@ -66,8 +66,8 @@
 }
 
 // constructor
-PIXI.Strip.constructor = PIXI.Strip;
 PIXI.Strip.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Strip.prototype.constructor = PIXI.Strip;
 
 PIXI.Strip.prototype.setTexture = function(texture)
 {
diff --git a/src/pixi/extras/TilingSprite.js b/src/pixi/extras/TilingSprite.js
index 9a49e1c..2cb17fa 100644
--- a/src/pixi/extras/TilingSprite.js
+++ b/src/pixi/extras/TilingSprite.js
@@ -62,8 +62,8 @@
 }
 
 // constructor
-PIXI.TilingSprite.constructor = PIXI.TilingSprite;
 PIXI.TilingSprite.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.TilingSprite.prototype.constructor = PIXI.TilingSprite;
 
 /**
  * Sets the texture of the tiling sprite
diff --git a/src/pixi/loaders/AssetLoader.js b/src/pixi/loaders/AssetLoader.js
index 7936b83..168a5f8 100644
--- a/src/pixi/loaders/AssetLoader.js
+++ b/src/pixi/loaders/AssetLoader.js
@@ -69,7 +69,7 @@
  */
 
 // constructor
-PIXI.AssetLoader.constructor = PIXI.AssetLoader;
+PIXI.AssetLoader.prototype.constructor = PIXI.AssetLoader;
 
 /**
  * Starts loading the assets sequentially
diff --git a/src/pixi/loaders/BitmapFontLoader.js b/src/pixi/loaders/BitmapFontLoader.js
index af08b83..4afd8aa 100644
--- a/src/pixi/loaders/BitmapFontLoader.js
+++ b/src/pixi/loaders/BitmapFontLoader.js
@@ -58,7 +58,7 @@
 };
 
 // constructor
-PIXI.BitmapFontLoader.constructor = PIXI.BitmapFontLoader;
+PIXI.BitmapFontLoader.prototype.constructor = PIXI.BitmapFontLoader;
 
 /**
  * Loads the XML font data
diff --git a/src/pixi/loaders/ImageLoader.js b/src/pixi/loaders/ImageLoader.js
index 942b009..971c012 100644
--- a/src/pixi/loaders/ImageLoader.js
+++ b/src/pixi/loaders/ImageLoader.js
@@ -27,7 +27,7 @@
 };
 
 // constructor
-PIXI.ImageLoader.constructor = PIXI.ImageLoader;
+PIXI.ImageLoader.prototype.constructor = PIXI.ImageLoader;
 
 /**
  * Loads image or takes it from cache
diff --git a/src/pixi/loaders/JsonLoader.js b/src/pixi/loaders/JsonLoader.js
index 1fee06b..1f4ecfe 100644
--- a/src/pixi/loaders/JsonLoader.js
+++ b/src/pixi/loaders/JsonLoader.js
@@ -53,7 +53,7 @@
 };
 
 // constructor
-PIXI.JsonLoader.constructor = PIXI.JsonLoader;
+PIXI.JsonLoader.prototype.constructor = PIXI.JsonLoader;
 
 /**
  * Loads the JSON data
diff --git a/src/pixi/loaders/SpineLoader.js b/src/pixi/loaders/SpineLoader.js
index ce32257..f5e16b0 100644
--- a/src/pixi/loaders/SpineLoader.js
+++ b/src/pixi/loaders/SpineLoader.js
@@ -51,7 +51,7 @@
 	this.loaded = false;
 }
 
-PIXI.SpineLoader.constructor = PIXI.SpineLoader;
+PIXI.SpineLoader.prototype.constructor = PIXI.SpineLoader;
 
 /**
  * Loads the JSON data
diff --git a/src/pixi/loaders/SpriteSheetLoader.js b/src/pixi/loaders/SpriteSheetLoader.js
index 5495f57..169fb70 100644
--- a/src/pixi/loaders/SpriteSheetLoader.js
+++ b/src/pixi/loaders/SpriteSheetLoader.js
@@ -69,7 +69,7 @@
 };
 
 // constructor
-PIXI.SpriteSheetLoader.constructor = PIXI.SpriteSheetLoader;
+PIXI.SpriteSheetLoader.prototype.constructor = PIXI.SpriteSheetLoader;
 
 /**
  * This will begin loading the JSON file
diff --git a/src/pixi/primitives/Graphics.js b/src/pixi/primitives/Graphics.js
index 768fede..7a80553 100644
--- a/src/pixi/primitives/Graphics.js
+++ b/src/pixi/primitives/Graphics.js
@@ -62,8 +62,8 @@
 }
 
 // constructor
-PIXI.Graphics.constructor = PIXI.Graphics;
 PIXI.Graphics.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Graphics.prototype.constructor = PIXI.Graphics;
 
 /**
  * Specifies a line style used for subsequent calls to Graphics methods such as the lineTo() method or the drawCircle() method.
diff --git a/src/pixi/renderers/canvas/CanvasRenderer.js b/src/pixi/renderers/canvas/CanvasRenderer.js
index d1be4b2..060327d 100644
--- a/src/pixi/renderers/canvas/CanvasRenderer.js
+++ b/src/pixi/renderers/canvas/CanvasRenderer.js
@@ -61,7 +61,7 @@
 }
 
 // constructor
-PIXI.CanvasRenderer.constructor = PIXI.CanvasRenderer;
+PIXI.CanvasRenderer.prototype.constructor = PIXI.CanvasRenderer;
 
 /**
  * Renders the stage to its canvas view

diff --git a/src/pixi/InteractionManager.js b/src/pixi/InteractionManager.js
index bdbb276..e125dc8 100644
--- a/src/pixi/InteractionManager.js
+++ b/src/pixi/InteractionManager.js
@@ -53,7 +53,7 @@
 }
 
 // constructor
-PIXI.InteractionManager.constructor = PIXI.InteractionManager;
+PIXI.InteractionManager.prototype.constructor = PIXI.InteractionManager;
 
 /**
  * Collects an interactive sprite recursively to have their interactions managed
@@ -618,4 +618,4 @@
 }
 
 // constructor
-PIXI.InteractionData.constructor = PIXI.InteractionData;
+PIXI.InteractionData.prototype.constructor = PIXI.InteractionData;
diff --git a/src/pixi/core/Circle.js b/src/pixi/core/Circle.js
index 6c3433d..a9ceed0 100644
--- a/src/pixi/core/Circle.js
+++ b/src/pixi/core/Circle.js
@@ -69,5 +69,5 @@
     return (dx + dy <= r2);
 }
 
-PIXI.Circle.constructor = PIXI.Circle;
+PIXI.Circle.prototype.constructor = PIXI.Circle;
 
diff --git a/src/pixi/core/Ellipse.js b/src/pixi/core/Ellipse.js
index a0703ad..dd369da 100644
--- a/src/pixi/core/Ellipse.js
+++ b/src/pixi/core/Ellipse.js
@@ -83,5 +83,5 @@
     return new PIXI.Rectangle(this.x, this.y, this.width, this.height);
 }
 
-PIXI.Ellipse.constructor = PIXI.Ellipse;
+PIXI.Ellipse.prototype.constructor = PIXI.Ellipse;
 
diff --git a/src/pixi/core/Point.js b/src/pixi/core/Point.js
index 294a8f8..8520861 100644
--- a/src/pixi/core/Point.js
+++ b/src/pixi/core/Point.js
@@ -39,5 +39,5 @@
 }
 
 // constructor
-PIXI.Point.constructor = PIXI.Point;
+PIXI.Point.prototype.constructor = PIXI.Point;
 
diff --git a/src/pixi/core/Polygon.js b/src/pixi/core/Polygon.js
index 5c1db06..47cf17b 100644
--- a/src/pixi/core/Polygon.js
+++ b/src/pixi/core/Polygon.js
@@ -73,5 +73,5 @@
     return inside;
 }
 
-PIXI.Polygon.constructor = PIXI.Polygon;
+PIXI.Polygon.prototype.constructor = PIXI.Polygon;
 
diff --git a/src/pixi/core/Rectangle.js b/src/pixi/core/Rectangle.js
index 64acf7a..66fb5d6 100644
--- a/src/pixi/core/Rectangle.js
+++ b/src/pixi/core/Rectangle.js
@@ -82,5 +82,5 @@
 }
 
 // constructor
-PIXI.Rectangle.constructor = PIXI.Rectangle;
+PIXI.Rectangle.prototype.constructor = PIXI.Rectangle;
 
diff --git a/src/pixi/display/DisplayObject.js b/src/pixi/display/DisplayObject.js
index 3b51aaf..f8ee024 100644
--- a/src/pixi/display/DisplayObject.js
+++ b/src/pixi/display/DisplayObject.js
@@ -258,7 +258,7 @@
 }
 
 // constructor
-PIXI.DisplayObject.constructor = PIXI.DisplayObject;
+PIXI.DisplayObject.prototype.constructor = PIXI.DisplayObject;
 
 //TODO make visible a getter setter
 /*
diff --git a/src/pixi/display/DisplayObjectContainer.js b/src/pixi/display/DisplayObjectContainer.js
index 4a3a204..649169f 100644
--- a/src/pixi/display/DisplayObjectContainer.js
+++ b/src/pixi/display/DisplayObjectContainer.js
@@ -26,8 +26,8 @@
 }
 
 // constructor
-PIXI.DisplayObjectContainer.constructor = PIXI.DisplayObjectContainer;
 PIXI.DisplayObjectContainer.prototype = Object.create( PIXI.DisplayObject.prototype );
+PIXI.DisplayObjectContainer.prototype.constructor = PIXI.DisplayObjectContainer;
 
 //TODO make visible a getter setter
 /*
diff --git a/src/pixi/display/MovieClip.js b/src/pixi/display/MovieClip.js
index b435ffe..7a77856 100644
--- a/src/pixi/display/MovieClip.js
+++ b/src/pixi/display/MovieClip.js
@@ -69,8 +69,8 @@
 }
 
 // constructor
-PIXI.MovieClip.constructor = PIXI.MovieClip;
 PIXI.MovieClip.prototype = Object.create( PIXI.Sprite.prototype );
+PIXI.MovieClip.prototype.constructor = PIXI.MovieClip;
 
 /**
  * Stops the MovieClip
diff --git a/src/pixi/display/Sprite.js b/src/pixi/display/Sprite.js
index 945331a..0713205 100644
--- a/src/pixi/display/Sprite.js
+++ b/src/pixi/display/Sprite.js
@@ -80,8 +80,8 @@
 }
 
 // constructor
-PIXI.Sprite.constructor = PIXI.Sprite;
 PIXI.Sprite.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Sprite.prototype.constructor = PIXI.Sprite;
 
 /**
  * The width of the sprite, setting this will actually modify the scale to acheive the value set
diff --git a/src/pixi/display/Stage.js b/src/pixi/display/Stage.js
index 447d77a..681c91b 100644
--- a/src/pixi/display/Stage.js
+++ b/src/pixi/display/Stage.js
@@ -65,8 +65,8 @@
 }
 
 // constructor
-PIXI.Stage.constructor = PIXI.Stage;
 PIXI.Stage.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Stage.prototype.constructor = PIXI.Stage;
 
 /*
  * Updates the object transform for rendering
diff --git a/src/pixi/extras/CustomRenderable.js b/src/pixi/extras/CustomRenderable.js
index 7477195..eb0dc5b 100644
--- a/src/pixi/extras/CustomRenderable.js
+++ b/src/pixi/extras/CustomRenderable.js
@@ -17,8 +17,8 @@
 }
 
 // constructor
-PIXI.CustomRenderable.constructor = PIXI.CustomRenderable;
 PIXI.CustomRenderable.prototype = Object.create( PIXI.DisplayObject.prototype );
+PIXI.CustomRenderable.prototype.constructor = PIXI.CustomRenderable;
 
 /**
  * If this object is being rendered by a CanvasRenderer it will call this callback
diff --git a/src/pixi/extras/Rope.js b/src/pixi/extras/Rope.js
index 879fd13..1c057c8 100644
--- a/src/pixi/extras/Rope.js
+++ b/src/pixi/extras/Rope.js
@@ -29,8 +29,8 @@
 
 
 // constructor
-PIXI.Rope.constructor = PIXI.Rope;
 PIXI.Rope.prototype = Object.create( PIXI.Strip.prototype );
+PIXI.Rope.prototype.constructor = PIXI.Rope;
 
 PIXI.Rope.prototype.refresh = function()
 {
diff --git a/src/pixi/extras/Spine.js b/src/pixi/extras/Spine.js
index 006fb6d..5ee161a 100644
--- a/src/pixi/extras/Spine.js
+++ b/src/pixi/extras/Spine.js
@@ -58,8 +58,8 @@
 	};
 }
 
-PIXI.Spine.constructor = PIXI.Spine;
 PIXI.Spine.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Spine.prototype.constructor = PIXI.Spine;
 
 /*
  * Updates the object transform for rendering
diff --git a/src/pixi/extras/Strip.js b/src/pixi/extras/Strip.js
index d2a6937..1e5ba3b 100644
--- a/src/pixi/extras/Strip.js
+++ b/src/pixi/extras/Strip.js
@@ -66,8 +66,8 @@
 }
 
 // constructor
-PIXI.Strip.constructor = PIXI.Strip;
 PIXI.Strip.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Strip.prototype.constructor = PIXI.Strip;
 
 PIXI.Strip.prototype.setTexture = function(texture)
 {
diff --git a/src/pixi/extras/TilingSprite.js b/src/pixi/extras/TilingSprite.js
index 9a49e1c..2cb17fa 100644
--- a/src/pixi/extras/TilingSprite.js
+++ b/src/pixi/extras/TilingSprite.js
@@ -62,8 +62,8 @@
 }
 
 // constructor
-PIXI.TilingSprite.constructor = PIXI.TilingSprite;
 PIXI.TilingSprite.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.TilingSprite.prototype.constructor = PIXI.TilingSprite;
 
 /**
  * Sets the texture of the tiling sprite
diff --git a/src/pixi/loaders/AssetLoader.js b/src/pixi/loaders/AssetLoader.js
index 7936b83..168a5f8 100644
--- a/src/pixi/loaders/AssetLoader.js
+++ b/src/pixi/loaders/AssetLoader.js
@@ -69,7 +69,7 @@
  */
 
 // constructor
-PIXI.AssetLoader.constructor = PIXI.AssetLoader;
+PIXI.AssetLoader.prototype.constructor = PIXI.AssetLoader;
 
 /**
  * Starts loading the assets sequentially
diff --git a/src/pixi/loaders/BitmapFontLoader.js b/src/pixi/loaders/BitmapFontLoader.js
index af08b83..4afd8aa 100644
--- a/src/pixi/loaders/BitmapFontLoader.js
+++ b/src/pixi/loaders/BitmapFontLoader.js
@@ -58,7 +58,7 @@
 };
 
 // constructor
-PIXI.BitmapFontLoader.constructor = PIXI.BitmapFontLoader;
+PIXI.BitmapFontLoader.prototype.constructor = PIXI.BitmapFontLoader;
 
 /**
  * Loads the XML font data
diff --git a/src/pixi/loaders/ImageLoader.js b/src/pixi/loaders/ImageLoader.js
index 942b009..971c012 100644
--- a/src/pixi/loaders/ImageLoader.js
+++ b/src/pixi/loaders/ImageLoader.js
@@ -27,7 +27,7 @@
 };
 
 // constructor
-PIXI.ImageLoader.constructor = PIXI.ImageLoader;
+PIXI.ImageLoader.prototype.constructor = PIXI.ImageLoader;
 
 /**
  * Loads image or takes it from cache
diff --git a/src/pixi/loaders/JsonLoader.js b/src/pixi/loaders/JsonLoader.js
index 1fee06b..1f4ecfe 100644
--- a/src/pixi/loaders/JsonLoader.js
+++ b/src/pixi/loaders/JsonLoader.js
@@ -53,7 +53,7 @@
 };
 
 // constructor
-PIXI.JsonLoader.constructor = PIXI.JsonLoader;
+PIXI.JsonLoader.prototype.constructor = PIXI.JsonLoader;
 
 /**
  * Loads the JSON data
diff --git a/src/pixi/loaders/SpineLoader.js b/src/pixi/loaders/SpineLoader.js
index ce32257..f5e16b0 100644
--- a/src/pixi/loaders/SpineLoader.js
+++ b/src/pixi/loaders/SpineLoader.js
@@ -51,7 +51,7 @@
 	this.loaded = false;
 }
 
-PIXI.SpineLoader.constructor = PIXI.SpineLoader;
+PIXI.SpineLoader.prototype.constructor = PIXI.SpineLoader;
 
 /**
  * Loads the JSON data
diff --git a/src/pixi/loaders/SpriteSheetLoader.js b/src/pixi/loaders/SpriteSheetLoader.js
index 5495f57..169fb70 100644
--- a/src/pixi/loaders/SpriteSheetLoader.js
+++ b/src/pixi/loaders/SpriteSheetLoader.js
@@ -69,7 +69,7 @@
 };
 
 // constructor
-PIXI.SpriteSheetLoader.constructor = PIXI.SpriteSheetLoader;
+PIXI.SpriteSheetLoader.prototype.constructor = PIXI.SpriteSheetLoader;
 
 /**
  * This will begin loading the JSON file
diff --git a/src/pixi/primitives/Graphics.js b/src/pixi/primitives/Graphics.js
index 768fede..7a80553 100644
--- a/src/pixi/primitives/Graphics.js
+++ b/src/pixi/primitives/Graphics.js
@@ -62,8 +62,8 @@
 }
 
 // constructor
-PIXI.Graphics.constructor = PIXI.Graphics;
 PIXI.Graphics.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Graphics.prototype.constructor = PIXI.Graphics;
 
 /**
  * Specifies a line style used for subsequent calls to Graphics methods such as the lineTo() method or the drawCircle() method.
diff --git a/src/pixi/renderers/canvas/CanvasRenderer.js b/src/pixi/renderers/canvas/CanvasRenderer.js
index d1be4b2..060327d 100644
--- a/src/pixi/renderers/canvas/CanvasRenderer.js
+++ b/src/pixi/renderers/canvas/CanvasRenderer.js
@@ -61,7 +61,7 @@
 }
 
 // constructor
-PIXI.CanvasRenderer.constructor = PIXI.CanvasRenderer;
+PIXI.CanvasRenderer.prototype.constructor = PIXI.CanvasRenderer;
 
 /**
  * Renders the stage to its canvas view
diff --git a/src/pixi/renderers/webgl/WebGLBatch.js b/src/pixi/renderers/webgl/WebGLBatch.js
index 1eca2fa..f452d37 100644
--- a/src/pixi/renderers/webgl/WebGLBatch.js
+++ b/src/pixi/renderers/webgl/WebGLBatch.js
@@ -66,7 +66,7 @@
 }
 
 // constructor
-PIXI.WebGLBatch.constructor = PIXI.WebGLBatch;
+PIXI.WebGLBatch.prototype.constructor = PIXI.WebGLBatch;
 
 /**
  * Cleans the batch so that is can be returned to an object pool and reused

diff --git a/src/pixi/InteractionManager.js b/src/pixi/InteractionManager.js
index bdbb276..e125dc8 100644
--- a/src/pixi/InteractionManager.js
+++ b/src/pixi/InteractionManager.js
@@ -53,7 +53,7 @@
 }
 
 // constructor
-PIXI.InteractionManager.constructor = PIXI.InteractionManager;
+PIXI.InteractionManager.prototype.constructor = PIXI.InteractionManager;
 
 /**
  * Collects an interactive sprite recursively to have their interactions managed
@@ -618,4 +618,4 @@
 }
 
 // constructor
-PIXI.InteractionData.constructor = PIXI.InteractionData;
+PIXI.InteractionData.prototype.constructor = PIXI.InteractionData;
diff --git a/src/pixi/core/Circle.js b/src/pixi/core/Circle.js
index 6c3433d..a9ceed0 100644
--- a/src/pixi/core/Circle.js
+++ b/src/pixi/core/Circle.js
@@ -69,5 +69,5 @@
     return (dx + dy <= r2);
 }
 
-PIXI.Circle.constructor = PIXI.Circle;
+PIXI.Circle.prototype.constructor = PIXI.Circle;
 
diff --git a/src/pixi/core/Ellipse.js b/src/pixi/core/Ellipse.js
index a0703ad..dd369da 100644
--- a/src/pixi/core/Ellipse.js
+++ b/src/pixi/core/Ellipse.js
@@ -83,5 +83,5 @@
     return new PIXI.Rectangle(this.x, this.y, this.width, this.height);
 }
 
-PIXI.Ellipse.constructor = PIXI.Ellipse;
+PIXI.Ellipse.prototype.constructor = PIXI.Ellipse;
 
diff --git a/src/pixi/core/Point.js b/src/pixi/core/Point.js
index 294a8f8..8520861 100644
--- a/src/pixi/core/Point.js
+++ b/src/pixi/core/Point.js
@@ -39,5 +39,5 @@
 }
 
 // constructor
-PIXI.Point.constructor = PIXI.Point;
+PIXI.Point.prototype.constructor = PIXI.Point;
 
diff --git a/src/pixi/core/Polygon.js b/src/pixi/core/Polygon.js
index 5c1db06..47cf17b 100644
--- a/src/pixi/core/Polygon.js
+++ b/src/pixi/core/Polygon.js
@@ -73,5 +73,5 @@
     return inside;
 }
 
-PIXI.Polygon.constructor = PIXI.Polygon;
+PIXI.Polygon.prototype.constructor = PIXI.Polygon;
 
diff --git a/src/pixi/core/Rectangle.js b/src/pixi/core/Rectangle.js
index 64acf7a..66fb5d6 100644
--- a/src/pixi/core/Rectangle.js
+++ b/src/pixi/core/Rectangle.js
@@ -82,5 +82,5 @@
 }
 
 // constructor
-PIXI.Rectangle.constructor = PIXI.Rectangle;
+PIXI.Rectangle.prototype.constructor = PIXI.Rectangle;
 
diff --git a/src/pixi/display/DisplayObject.js b/src/pixi/display/DisplayObject.js
index 3b51aaf..f8ee024 100644
--- a/src/pixi/display/DisplayObject.js
+++ b/src/pixi/display/DisplayObject.js
@@ -258,7 +258,7 @@
 }
 
 // constructor
-PIXI.DisplayObject.constructor = PIXI.DisplayObject;
+PIXI.DisplayObject.prototype.constructor = PIXI.DisplayObject;
 
 //TODO make visible a getter setter
 /*
diff --git a/src/pixi/display/DisplayObjectContainer.js b/src/pixi/display/DisplayObjectContainer.js
index 4a3a204..649169f 100644
--- a/src/pixi/display/DisplayObjectContainer.js
+++ b/src/pixi/display/DisplayObjectContainer.js
@@ -26,8 +26,8 @@
 }
 
 // constructor
-PIXI.DisplayObjectContainer.constructor = PIXI.DisplayObjectContainer;
 PIXI.DisplayObjectContainer.prototype = Object.create( PIXI.DisplayObject.prototype );
+PIXI.DisplayObjectContainer.prototype.constructor = PIXI.DisplayObjectContainer;
 
 //TODO make visible a getter setter
 /*
diff --git a/src/pixi/display/MovieClip.js b/src/pixi/display/MovieClip.js
index b435ffe..7a77856 100644
--- a/src/pixi/display/MovieClip.js
+++ b/src/pixi/display/MovieClip.js
@@ -69,8 +69,8 @@
 }
 
 // constructor
-PIXI.MovieClip.constructor = PIXI.MovieClip;
 PIXI.MovieClip.prototype = Object.create( PIXI.Sprite.prototype );
+PIXI.MovieClip.prototype.constructor = PIXI.MovieClip;
 
 /**
  * Stops the MovieClip
diff --git a/src/pixi/display/Sprite.js b/src/pixi/display/Sprite.js
index 945331a..0713205 100644
--- a/src/pixi/display/Sprite.js
+++ b/src/pixi/display/Sprite.js
@@ -80,8 +80,8 @@
 }
 
 // constructor
-PIXI.Sprite.constructor = PIXI.Sprite;
 PIXI.Sprite.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Sprite.prototype.constructor = PIXI.Sprite;
 
 /**
  * The width of the sprite, setting this will actually modify the scale to acheive the value set
diff --git a/src/pixi/display/Stage.js b/src/pixi/display/Stage.js
index 447d77a..681c91b 100644
--- a/src/pixi/display/Stage.js
+++ b/src/pixi/display/Stage.js
@@ -65,8 +65,8 @@
 }
 
 // constructor
-PIXI.Stage.constructor = PIXI.Stage;
 PIXI.Stage.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Stage.prototype.constructor = PIXI.Stage;
 
 /*
  * Updates the object transform for rendering
diff --git a/src/pixi/extras/CustomRenderable.js b/src/pixi/extras/CustomRenderable.js
index 7477195..eb0dc5b 100644
--- a/src/pixi/extras/CustomRenderable.js
+++ b/src/pixi/extras/CustomRenderable.js
@@ -17,8 +17,8 @@
 }
 
 // constructor
-PIXI.CustomRenderable.constructor = PIXI.CustomRenderable;
 PIXI.CustomRenderable.prototype = Object.create( PIXI.DisplayObject.prototype );
+PIXI.CustomRenderable.prototype.constructor = PIXI.CustomRenderable;
 
 /**
  * If this object is being rendered by a CanvasRenderer it will call this callback
diff --git a/src/pixi/extras/Rope.js b/src/pixi/extras/Rope.js
index 879fd13..1c057c8 100644
--- a/src/pixi/extras/Rope.js
+++ b/src/pixi/extras/Rope.js
@@ -29,8 +29,8 @@
 
 
 // constructor
-PIXI.Rope.constructor = PIXI.Rope;
 PIXI.Rope.prototype = Object.create( PIXI.Strip.prototype );
+PIXI.Rope.prototype.constructor = PIXI.Rope;
 
 PIXI.Rope.prototype.refresh = function()
 {
diff --git a/src/pixi/extras/Spine.js b/src/pixi/extras/Spine.js
index 006fb6d..5ee161a 100644
--- a/src/pixi/extras/Spine.js
+++ b/src/pixi/extras/Spine.js
@@ -58,8 +58,8 @@
 	};
 }
 
-PIXI.Spine.constructor = PIXI.Spine;
 PIXI.Spine.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Spine.prototype.constructor = PIXI.Spine;
 
 /*
  * Updates the object transform for rendering
diff --git a/src/pixi/extras/Strip.js b/src/pixi/extras/Strip.js
index d2a6937..1e5ba3b 100644
--- a/src/pixi/extras/Strip.js
+++ b/src/pixi/extras/Strip.js
@@ -66,8 +66,8 @@
 }
 
 // constructor
-PIXI.Strip.constructor = PIXI.Strip;
 PIXI.Strip.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Strip.prototype.constructor = PIXI.Strip;
 
 PIXI.Strip.prototype.setTexture = function(texture)
 {
diff --git a/src/pixi/extras/TilingSprite.js b/src/pixi/extras/TilingSprite.js
index 9a49e1c..2cb17fa 100644
--- a/src/pixi/extras/TilingSprite.js
+++ b/src/pixi/extras/TilingSprite.js
@@ -62,8 +62,8 @@
 }
 
 // constructor
-PIXI.TilingSprite.constructor = PIXI.TilingSprite;
 PIXI.TilingSprite.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.TilingSprite.prototype.constructor = PIXI.TilingSprite;
 
 /**
  * Sets the texture of the tiling sprite
diff --git a/src/pixi/loaders/AssetLoader.js b/src/pixi/loaders/AssetLoader.js
index 7936b83..168a5f8 100644
--- a/src/pixi/loaders/AssetLoader.js
+++ b/src/pixi/loaders/AssetLoader.js
@@ -69,7 +69,7 @@
  */
 
 // constructor
-PIXI.AssetLoader.constructor = PIXI.AssetLoader;
+PIXI.AssetLoader.prototype.constructor = PIXI.AssetLoader;
 
 /**
  * Starts loading the assets sequentially
diff --git a/src/pixi/loaders/BitmapFontLoader.js b/src/pixi/loaders/BitmapFontLoader.js
index af08b83..4afd8aa 100644
--- a/src/pixi/loaders/BitmapFontLoader.js
+++ b/src/pixi/loaders/BitmapFontLoader.js
@@ -58,7 +58,7 @@
 };
 
 // constructor
-PIXI.BitmapFontLoader.constructor = PIXI.BitmapFontLoader;
+PIXI.BitmapFontLoader.prototype.constructor = PIXI.BitmapFontLoader;
 
 /**
  * Loads the XML font data
diff --git a/src/pixi/loaders/ImageLoader.js b/src/pixi/loaders/ImageLoader.js
index 942b009..971c012 100644
--- a/src/pixi/loaders/ImageLoader.js
+++ b/src/pixi/loaders/ImageLoader.js
@@ -27,7 +27,7 @@
 };
 
 // constructor
-PIXI.ImageLoader.constructor = PIXI.ImageLoader;
+PIXI.ImageLoader.prototype.constructor = PIXI.ImageLoader;
 
 /**
  * Loads image or takes it from cache
diff --git a/src/pixi/loaders/JsonLoader.js b/src/pixi/loaders/JsonLoader.js
index 1fee06b..1f4ecfe 100644
--- a/src/pixi/loaders/JsonLoader.js
+++ b/src/pixi/loaders/JsonLoader.js
@@ -53,7 +53,7 @@
 };
 
 // constructor
-PIXI.JsonLoader.constructor = PIXI.JsonLoader;
+PIXI.JsonLoader.prototype.constructor = PIXI.JsonLoader;
 
 /**
  * Loads the JSON data
diff --git a/src/pixi/loaders/SpineLoader.js b/src/pixi/loaders/SpineLoader.js
index ce32257..f5e16b0 100644
--- a/src/pixi/loaders/SpineLoader.js
+++ b/src/pixi/loaders/SpineLoader.js
@@ -51,7 +51,7 @@
 	this.loaded = false;
 }
 
-PIXI.SpineLoader.constructor = PIXI.SpineLoader;
+PIXI.SpineLoader.prototype.constructor = PIXI.SpineLoader;
 
 /**
  * Loads the JSON data
diff --git a/src/pixi/loaders/SpriteSheetLoader.js b/src/pixi/loaders/SpriteSheetLoader.js
index 5495f57..169fb70 100644
--- a/src/pixi/loaders/SpriteSheetLoader.js
+++ b/src/pixi/loaders/SpriteSheetLoader.js
@@ -69,7 +69,7 @@
 };
 
 // constructor
-PIXI.SpriteSheetLoader.constructor = PIXI.SpriteSheetLoader;
+PIXI.SpriteSheetLoader.prototype.constructor = PIXI.SpriteSheetLoader;
 
 /**
  * This will begin loading the JSON file
diff --git a/src/pixi/primitives/Graphics.js b/src/pixi/primitives/Graphics.js
index 768fede..7a80553 100644
--- a/src/pixi/primitives/Graphics.js
+++ b/src/pixi/primitives/Graphics.js
@@ -62,8 +62,8 @@
 }
 
 // constructor
-PIXI.Graphics.constructor = PIXI.Graphics;
 PIXI.Graphics.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Graphics.prototype.constructor = PIXI.Graphics;
 
 /**
  * Specifies a line style used for subsequent calls to Graphics methods such as the lineTo() method or the drawCircle() method.
diff --git a/src/pixi/renderers/canvas/CanvasRenderer.js b/src/pixi/renderers/canvas/CanvasRenderer.js
index d1be4b2..060327d 100644
--- a/src/pixi/renderers/canvas/CanvasRenderer.js
+++ b/src/pixi/renderers/canvas/CanvasRenderer.js
@@ -61,7 +61,7 @@
 }
 
 // constructor
-PIXI.CanvasRenderer.constructor = PIXI.CanvasRenderer;
+PIXI.CanvasRenderer.prototype.constructor = PIXI.CanvasRenderer;
 
 /**
  * Renders the stage to its canvas view
diff --git a/src/pixi/renderers/webgl/WebGLBatch.js b/src/pixi/renderers/webgl/WebGLBatch.js
index 1eca2fa..f452d37 100644
--- a/src/pixi/renderers/webgl/WebGLBatch.js
+++ b/src/pixi/renderers/webgl/WebGLBatch.js
@@ -66,7 +66,7 @@
 }
 
 // constructor
-PIXI.WebGLBatch.constructor = PIXI.WebGLBatch;
+PIXI.WebGLBatch.prototype.constructor = PIXI.WebGLBatch;
 
 /**
  * Cleans the batch so that is can be returned to an object pool and reused
diff --git a/src/pixi/renderers/webgl/WebGLRenderGroup.js b/src/pixi/renderers/webgl/WebGLRenderGroup.js
index 277d893..a4ad4e9 100644
--- a/src/pixi/renderers/webgl/WebGLRenderGroup.js
+++ b/src/pixi/renderers/webgl/WebGLRenderGroup.js
@@ -26,7 +26,7 @@
 }
 
 // constructor
-PIXI.WebGLRenderGroup.constructor = PIXI.WebGLRenderGroup;
+PIXI.WebGLRenderGroup.prototype.constructor = PIXI.WebGLRenderGroup;
 
 /**
  * Add a display object to the webgl renderer

diff --git a/src/pixi/InteractionManager.js b/src/pixi/InteractionManager.js
index bdbb276..e125dc8 100644
--- a/src/pixi/InteractionManager.js
+++ b/src/pixi/InteractionManager.js
@@ -53,7 +53,7 @@
 }
 
 // constructor
-PIXI.InteractionManager.constructor = PIXI.InteractionManager;
+PIXI.InteractionManager.prototype.constructor = PIXI.InteractionManager;
 
 /**
  * Collects an interactive sprite recursively to have their interactions managed
@@ -618,4 +618,4 @@
 }
 
 // constructor
-PIXI.InteractionData.constructor = PIXI.InteractionData;
+PIXI.InteractionData.prototype.constructor = PIXI.InteractionData;
diff --git a/src/pixi/core/Circle.js b/src/pixi/core/Circle.js
index 6c3433d..a9ceed0 100644
--- a/src/pixi/core/Circle.js
+++ b/src/pixi/core/Circle.js
@@ -69,5 +69,5 @@
     return (dx + dy <= r2);
 }
 
-PIXI.Circle.constructor = PIXI.Circle;
+PIXI.Circle.prototype.constructor = PIXI.Circle;
 
diff --git a/src/pixi/core/Ellipse.js b/src/pixi/core/Ellipse.js
index a0703ad..dd369da 100644
--- a/src/pixi/core/Ellipse.js
+++ b/src/pixi/core/Ellipse.js
@@ -83,5 +83,5 @@
     return new PIXI.Rectangle(this.x, this.y, this.width, this.height);
 }
 
-PIXI.Ellipse.constructor = PIXI.Ellipse;
+PIXI.Ellipse.prototype.constructor = PIXI.Ellipse;
 
diff --git a/src/pixi/core/Point.js b/src/pixi/core/Point.js
index 294a8f8..8520861 100644
--- a/src/pixi/core/Point.js
+++ b/src/pixi/core/Point.js
@@ -39,5 +39,5 @@
 }
 
 // constructor
-PIXI.Point.constructor = PIXI.Point;
+PIXI.Point.prototype.constructor = PIXI.Point;
 
diff --git a/src/pixi/core/Polygon.js b/src/pixi/core/Polygon.js
index 5c1db06..47cf17b 100644
--- a/src/pixi/core/Polygon.js
+++ b/src/pixi/core/Polygon.js
@@ -73,5 +73,5 @@
     return inside;
 }
 
-PIXI.Polygon.constructor = PIXI.Polygon;
+PIXI.Polygon.prototype.constructor = PIXI.Polygon;
 
diff --git a/src/pixi/core/Rectangle.js b/src/pixi/core/Rectangle.js
index 64acf7a..66fb5d6 100644
--- a/src/pixi/core/Rectangle.js
+++ b/src/pixi/core/Rectangle.js
@@ -82,5 +82,5 @@
 }
 
 // constructor
-PIXI.Rectangle.constructor = PIXI.Rectangle;
+PIXI.Rectangle.prototype.constructor = PIXI.Rectangle;
 
diff --git a/src/pixi/display/DisplayObject.js b/src/pixi/display/DisplayObject.js
index 3b51aaf..f8ee024 100644
--- a/src/pixi/display/DisplayObject.js
+++ b/src/pixi/display/DisplayObject.js
@@ -258,7 +258,7 @@
 }
 
 // constructor
-PIXI.DisplayObject.constructor = PIXI.DisplayObject;
+PIXI.DisplayObject.prototype.constructor = PIXI.DisplayObject;
 
 //TODO make visible a getter setter
 /*
diff --git a/src/pixi/display/DisplayObjectContainer.js b/src/pixi/display/DisplayObjectContainer.js
index 4a3a204..649169f 100644
--- a/src/pixi/display/DisplayObjectContainer.js
+++ b/src/pixi/display/DisplayObjectContainer.js
@@ -26,8 +26,8 @@
 }
 
 // constructor
-PIXI.DisplayObjectContainer.constructor = PIXI.DisplayObjectContainer;
 PIXI.DisplayObjectContainer.prototype = Object.create( PIXI.DisplayObject.prototype );
+PIXI.DisplayObjectContainer.prototype.constructor = PIXI.DisplayObjectContainer;
 
 //TODO make visible a getter setter
 /*
diff --git a/src/pixi/display/MovieClip.js b/src/pixi/display/MovieClip.js
index b435ffe..7a77856 100644
--- a/src/pixi/display/MovieClip.js
+++ b/src/pixi/display/MovieClip.js
@@ -69,8 +69,8 @@
 }
 
 // constructor
-PIXI.MovieClip.constructor = PIXI.MovieClip;
 PIXI.MovieClip.prototype = Object.create( PIXI.Sprite.prototype );
+PIXI.MovieClip.prototype.constructor = PIXI.MovieClip;
 
 /**
  * Stops the MovieClip
diff --git a/src/pixi/display/Sprite.js b/src/pixi/display/Sprite.js
index 945331a..0713205 100644
--- a/src/pixi/display/Sprite.js
+++ b/src/pixi/display/Sprite.js
@@ -80,8 +80,8 @@
 }
 
 // constructor
-PIXI.Sprite.constructor = PIXI.Sprite;
 PIXI.Sprite.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Sprite.prototype.constructor = PIXI.Sprite;
 
 /**
  * The width of the sprite, setting this will actually modify the scale to acheive the value set
diff --git a/src/pixi/display/Stage.js b/src/pixi/display/Stage.js
index 447d77a..681c91b 100644
--- a/src/pixi/display/Stage.js
+++ b/src/pixi/display/Stage.js
@@ -65,8 +65,8 @@
 }
 
 // constructor
-PIXI.Stage.constructor = PIXI.Stage;
 PIXI.Stage.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Stage.prototype.constructor = PIXI.Stage;
 
 /*
  * Updates the object transform for rendering
diff --git a/src/pixi/extras/CustomRenderable.js b/src/pixi/extras/CustomRenderable.js
index 7477195..eb0dc5b 100644
--- a/src/pixi/extras/CustomRenderable.js
+++ b/src/pixi/extras/CustomRenderable.js
@@ -17,8 +17,8 @@
 }
 
 // constructor
-PIXI.CustomRenderable.constructor = PIXI.CustomRenderable;
 PIXI.CustomRenderable.prototype = Object.create( PIXI.DisplayObject.prototype );
+PIXI.CustomRenderable.prototype.constructor = PIXI.CustomRenderable;
 
 /**
  * If this object is being rendered by a CanvasRenderer it will call this callback
diff --git a/src/pixi/extras/Rope.js b/src/pixi/extras/Rope.js
index 879fd13..1c057c8 100644
--- a/src/pixi/extras/Rope.js
+++ b/src/pixi/extras/Rope.js
@@ -29,8 +29,8 @@
 
 
 // constructor
-PIXI.Rope.constructor = PIXI.Rope;
 PIXI.Rope.prototype = Object.create( PIXI.Strip.prototype );
+PIXI.Rope.prototype.constructor = PIXI.Rope;
 
 PIXI.Rope.prototype.refresh = function()
 {
diff --git a/src/pixi/extras/Spine.js b/src/pixi/extras/Spine.js
index 006fb6d..5ee161a 100644
--- a/src/pixi/extras/Spine.js
+++ b/src/pixi/extras/Spine.js
@@ -58,8 +58,8 @@
 	};
 }
 
-PIXI.Spine.constructor = PIXI.Spine;
 PIXI.Spine.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Spine.prototype.constructor = PIXI.Spine;
 
 /*
  * Updates the object transform for rendering
diff --git a/src/pixi/extras/Strip.js b/src/pixi/extras/Strip.js
index d2a6937..1e5ba3b 100644
--- a/src/pixi/extras/Strip.js
+++ b/src/pixi/extras/Strip.js
@@ -66,8 +66,8 @@
 }
 
 // constructor
-PIXI.Strip.constructor = PIXI.Strip;
 PIXI.Strip.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Strip.prototype.constructor = PIXI.Strip;
 
 PIXI.Strip.prototype.setTexture = function(texture)
 {
diff --git a/src/pixi/extras/TilingSprite.js b/src/pixi/extras/TilingSprite.js
index 9a49e1c..2cb17fa 100644
--- a/src/pixi/extras/TilingSprite.js
+++ b/src/pixi/extras/TilingSprite.js
@@ -62,8 +62,8 @@
 }
 
 // constructor
-PIXI.TilingSprite.constructor = PIXI.TilingSprite;
 PIXI.TilingSprite.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.TilingSprite.prototype.constructor = PIXI.TilingSprite;
 
 /**
  * Sets the texture of the tiling sprite
diff --git a/src/pixi/loaders/AssetLoader.js b/src/pixi/loaders/AssetLoader.js
index 7936b83..168a5f8 100644
--- a/src/pixi/loaders/AssetLoader.js
+++ b/src/pixi/loaders/AssetLoader.js
@@ -69,7 +69,7 @@
  */
 
 // constructor
-PIXI.AssetLoader.constructor = PIXI.AssetLoader;
+PIXI.AssetLoader.prototype.constructor = PIXI.AssetLoader;
 
 /**
  * Starts loading the assets sequentially
diff --git a/src/pixi/loaders/BitmapFontLoader.js b/src/pixi/loaders/BitmapFontLoader.js
index af08b83..4afd8aa 100644
--- a/src/pixi/loaders/BitmapFontLoader.js
+++ b/src/pixi/loaders/BitmapFontLoader.js
@@ -58,7 +58,7 @@
 };
 
 // constructor
-PIXI.BitmapFontLoader.constructor = PIXI.BitmapFontLoader;
+PIXI.BitmapFontLoader.prototype.constructor = PIXI.BitmapFontLoader;
 
 /**
  * Loads the XML font data
diff --git a/src/pixi/loaders/ImageLoader.js b/src/pixi/loaders/ImageLoader.js
index 942b009..971c012 100644
--- a/src/pixi/loaders/ImageLoader.js
+++ b/src/pixi/loaders/ImageLoader.js
@@ -27,7 +27,7 @@
 };
 
 // constructor
-PIXI.ImageLoader.constructor = PIXI.ImageLoader;
+PIXI.ImageLoader.prototype.constructor = PIXI.ImageLoader;
 
 /**
  * Loads image or takes it from cache
diff --git a/src/pixi/loaders/JsonLoader.js b/src/pixi/loaders/JsonLoader.js
index 1fee06b..1f4ecfe 100644
--- a/src/pixi/loaders/JsonLoader.js
+++ b/src/pixi/loaders/JsonLoader.js
@@ -53,7 +53,7 @@
 };
 
 // constructor
-PIXI.JsonLoader.constructor = PIXI.JsonLoader;
+PIXI.JsonLoader.prototype.constructor = PIXI.JsonLoader;
 
 /**
  * Loads the JSON data
diff --git a/src/pixi/loaders/SpineLoader.js b/src/pixi/loaders/SpineLoader.js
index ce32257..f5e16b0 100644
--- a/src/pixi/loaders/SpineLoader.js
+++ b/src/pixi/loaders/SpineLoader.js
@@ -51,7 +51,7 @@
 	this.loaded = false;
 }
 
-PIXI.SpineLoader.constructor = PIXI.SpineLoader;
+PIXI.SpineLoader.prototype.constructor = PIXI.SpineLoader;
 
 /**
  * Loads the JSON data
diff --git a/src/pixi/loaders/SpriteSheetLoader.js b/src/pixi/loaders/SpriteSheetLoader.js
index 5495f57..169fb70 100644
--- a/src/pixi/loaders/SpriteSheetLoader.js
+++ b/src/pixi/loaders/SpriteSheetLoader.js
@@ -69,7 +69,7 @@
 };
 
 // constructor
-PIXI.SpriteSheetLoader.constructor = PIXI.SpriteSheetLoader;
+PIXI.SpriteSheetLoader.prototype.constructor = PIXI.SpriteSheetLoader;
 
 /**
  * This will begin loading the JSON file
diff --git a/src/pixi/primitives/Graphics.js b/src/pixi/primitives/Graphics.js
index 768fede..7a80553 100644
--- a/src/pixi/primitives/Graphics.js
+++ b/src/pixi/primitives/Graphics.js
@@ -62,8 +62,8 @@
 }
 
 // constructor
-PIXI.Graphics.constructor = PIXI.Graphics;
 PIXI.Graphics.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Graphics.prototype.constructor = PIXI.Graphics;
 
 /**
  * Specifies a line style used for subsequent calls to Graphics methods such as the lineTo() method or the drawCircle() method.
diff --git a/src/pixi/renderers/canvas/CanvasRenderer.js b/src/pixi/renderers/canvas/CanvasRenderer.js
index d1be4b2..060327d 100644
--- a/src/pixi/renderers/canvas/CanvasRenderer.js
+++ b/src/pixi/renderers/canvas/CanvasRenderer.js
@@ -61,7 +61,7 @@
 }
 
 // constructor
-PIXI.CanvasRenderer.constructor = PIXI.CanvasRenderer;
+PIXI.CanvasRenderer.prototype.constructor = PIXI.CanvasRenderer;
 
 /**
  * Renders the stage to its canvas view
diff --git a/src/pixi/renderers/webgl/WebGLBatch.js b/src/pixi/renderers/webgl/WebGLBatch.js
index 1eca2fa..f452d37 100644
--- a/src/pixi/renderers/webgl/WebGLBatch.js
+++ b/src/pixi/renderers/webgl/WebGLBatch.js
@@ -66,7 +66,7 @@
 }
 
 // constructor
-PIXI.WebGLBatch.constructor = PIXI.WebGLBatch;
+PIXI.WebGLBatch.prototype.constructor = PIXI.WebGLBatch;
 
 /**
  * Cleans the batch so that is can be returned to an object pool and reused
diff --git a/src/pixi/renderers/webgl/WebGLRenderGroup.js b/src/pixi/renderers/webgl/WebGLRenderGroup.js
index 277d893..a4ad4e9 100644
--- a/src/pixi/renderers/webgl/WebGLRenderGroup.js
+++ b/src/pixi/renderers/webgl/WebGLRenderGroup.js
@@ -26,7 +26,7 @@
 }
 
 // constructor
-PIXI.WebGLRenderGroup.constructor = PIXI.WebGLRenderGroup;
+PIXI.WebGLRenderGroup.prototype.constructor = PIXI.WebGLRenderGroup;
 
 /**
  * Add a display object to the webgl renderer
diff --git a/src/pixi/renderers/webgl/WebGLRenderer.js b/src/pixi/renderers/webgl/WebGLRenderer.js
index 5ea5adc..2ecb971 100644
--- a/src/pixi/renderers/webgl/WebGLRenderer.js
+++ b/src/pixi/renderers/webgl/WebGLRenderer.js
@@ -81,7 +81,7 @@
 }
 
 // constructor
-PIXI.WebGLRenderer.constructor = PIXI.WebGLRenderer;
+PIXI.WebGLRenderer.prototype.constructor = PIXI.WebGLRenderer;
 
 /**
  * Gets a new WebGLBatch from the pool

diff --git a/src/pixi/InteractionManager.js b/src/pixi/InteractionManager.js
index bdbb276..e125dc8 100644
--- a/src/pixi/InteractionManager.js
+++ b/src/pixi/InteractionManager.js
@@ -53,7 +53,7 @@
 }
 
 // constructor
-PIXI.InteractionManager.constructor = PIXI.InteractionManager;
+PIXI.InteractionManager.prototype.constructor = PIXI.InteractionManager;
 
 /**
  * Collects an interactive sprite recursively to have their interactions managed
@@ -618,4 +618,4 @@
 }
 
 // constructor
-PIXI.InteractionData.constructor = PIXI.InteractionData;
+PIXI.InteractionData.prototype.constructor = PIXI.InteractionData;
diff --git a/src/pixi/core/Circle.js b/src/pixi/core/Circle.js
index 6c3433d..a9ceed0 100644
--- a/src/pixi/core/Circle.js
+++ b/src/pixi/core/Circle.js
@@ -69,5 +69,5 @@
     return (dx + dy <= r2);
 }
 
-PIXI.Circle.constructor = PIXI.Circle;
+PIXI.Circle.prototype.constructor = PIXI.Circle;
 
diff --git a/src/pixi/core/Ellipse.js b/src/pixi/core/Ellipse.js
index a0703ad..dd369da 100644
--- a/src/pixi/core/Ellipse.js
+++ b/src/pixi/core/Ellipse.js
@@ -83,5 +83,5 @@
     return new PIXI.Rectangle(this.x, this.y, this.width, this.height);
 }
 
-PIXI.Ellipse.constructor = PIXI.Ellipse;
+PIXI.Ellipse.prototype.constructor = PIXI.Ellipse;
 
diff --git a/src/pixi/core/Point.js b/src/pixi/core/Point.js
index 294a8f8..8520861 100644
--- a/src/pixi/core/Point.js
+++ b/src/pixi/core/Point.js
@@ -39,5 +39,5 @@
 }
 
 // constructor
-PIXI.Point.constructor = PIXI.Point;
+PIXI.Point.prototype.constructor = PIXI.Point;
 
diff --git a/src/pixi/core/Polygon.js b/src/pixi/core/Polygon.js
index 5c1db06..47cf17b 100644
--- a/src/pixi/core/Polygon.js
+++ b/src/pixi/core/Polygon.js
@@ -73,5 +73,5 @@
     return inside;
 }
 
-PIXI.Polygon.constructor = PIXI.Polygon;
+PIXI.Polygon.prototype.constructor = PIXI.Polygon;
 
diff --git a/src/pixi/core/Rectangle.js b/src/pixi/core/Rectangle.js
index 64acf7a..66fb5d6 100644
--- a/src/pixi/core/Rectangle.js
+++ b/src/pixi/core/Rectangle.js
@@ -82,5 +82,5 @@
 }
 
 // constructor
-PIXI.Rectangle.constructor = PIXI.Rectangle;
+PIXI.Rectangle.prototype.constructor = PIXI.Rectangle;
 
diff --git a/src/pixi/display/DisplayObject.js b/src/pixi/display/DisplayObject.js
index 3b51aaf..f8ee024 100644
--- a/src/pixi/display/DisplayObject.js
+++ b/src/pixi/display/DisplayObject.js
@@ -258,7 +258,7 @@
 }
 
 // constructor
-PIXI.DisplayObject.constructor = PIXI.DisplayObject;
+PIXI.DisplayObject.prototype.constructor = PIXI.DisplayObject;
 
 //TODO make visible a getter setter
 /*
diff --git a/src/pixi/display/DisplayObjectContainer.js b/src/pixi/display/DisplayObjectContainer.js
index 4a3a204..649169f 100644
--- a/src/pixi/display/DisplayObjectContainer.js
+++ b/src/pixi/display/DisplayObjectContainer.js
@@ -26,8 +26,8 @@
 }
 
 // constructor
-PIXI.DisplayObjectContainer.constructor = PIXI.DisplayObjectContainer;
 PIXI.DisplayObjectContainer.prototype = Object.create( PIXI.DisplayObject.prototype );
+PIXI.DisplayObjectContainer.prototype.constructor = PIXI.DisplayObjectContainer;
 
 //TODO make visible a getter setter
 /*
diff --git a/src/pixi/display/MovieClip.js b/src/pixi/display/MovieClip.js
index b435ffe..7a77856 100644
--- a/src/pixi/display/MovieClip.js
+++ b/src/pixi/display/MovieClip.js
@@ -69,8 +69,8 @@
 }
 
 // constructor
-PIXI.MovieClip.constructor = PIXI.MovieClip;
 PIXI.MovieClip.prototype = Object.create( PIXI.Sprite.prototype );
+PIXI.MovieClip.prototype.constructor = PIXI.MovieClip;
 
 /**
  * Stops the MovieClip
diff --git a/src/pixi/display/Sprite.js b/src/pixi/display/Sprite.js
index 945331a..0713205 100644
--- a/src/pixi/display/Sprite.js
+++ b/src/pixi/display/Sprite.js
@@ -80,8 +80,8 @@
 }
 
 // constructor
-PIXI.Sprite.constructor = PIXI.Sprite;
 PIXI.Sprite.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Sprite.prototype.constructor = PIXI.Sprite;
 
 /**
  * The width of the sprite, setting this will actually modify the scale to acheive the value set
diff --git a/src/pixi/display/Stage.js b/src/pixi/display/Stage.js
index 447d77a..681c91b 100644
--- a/src/pixi/display/Stage.js
+++ b/src/pixi/display/Stage.js
@@ -65,8 +65,8 @@
 }
 
 // constructor
-PIXI.Stage.constructor = PIXI.Stage;
 PIXI.Stage.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Stage.prototype.constructor = PIXI.Stage;
 
 /*
  * Updates the object transform for rendering
diff --git a/src/pixi/extras/CustomRenderable.js b/src/pixi/extras/CustomRenderable.js
index 7477195..eb0dc5b 100644
--- a/src/pixi/extras/CustomRenderable.js
+++ b/src/pixi/extras/CustomRenderable.js
@@ -17,8 +17,8 @@
 }
 
 // constructor
-PIXI.CustomRenderable.constructor = PIXI.CustomRenderable;
 PIXI.CustomRenderable.prototype = Object.create( PIXI.DisplayObject.prototype );
+PIXI.CustomRenderable.prototype.constructor = PIXI.CustomRenderable;
 
 /**
  * If this object is being rendered by a CanvasRenderer it will call this callback
diff --git a/src/pixi/extras/Rope.js b/src/pixi/extras/Rope.js
index 879fd13..1c057c8 100644
--- a/src/pixi/extras/Rope.js
+++ b/src/pixi/extras/Rope.js
@@ -29,8 +29,8 @@
 
 
 // constructor
-PIXI.Rope.constructor = PIXI.Rope;
 PIXI.Rope.prototype = Object.create( PIXI.Strip.prototype );
+PIXI.Rope.prototype.constructor = PIXI.Rope;
 
 PIXI.Rope.prototype.refresh = function()
 {
diff --git a/src/pixi/extras/Spine.js b/src/pixi/extras/Spine.js
index 006fb6d..5ee161a 100644
--- a/src/pixi/extras/Spine.js
+++ b/src/pixi/extras/Spine.js
@@ -58,8 +58,8 @@
 	};
 }
 
-PIXI.Spine.constructor = PIXI.Spine;
 PIXI.Spine.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Spine.prototype.constructor = PIXI.Spine;
 
 /*
  * Updates the object transform for rendering
diff --git a/src/pixi/extras/Strip.js b/src/pixi/extras/Strip.js
index d2a6937..1e5ba3b 100644
--- a/src/pixi/extras/Strip.js
+++ b/src/pixi/extras/Strip.js
@@ -66,8 +66,8 @@
 }
 
 // constructor
-PIXI.Strip.constructor = PIXI.Strip;
 PIXI.Strip.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Strip.prototype.constructor = PIXI.Strip;
 
 PIXI.Strip.prototype.setTexture = function(texture)
 {
diff --git a/src/pixi/extras/TilingSprite.js b/src/pixi/extras/TilingSprite.js
index 9a49e1c..2cb17fa 100644
--- a/src/pixi/extras/TilingSprite.js
+++ b/src/pixi/extras/TilingSprite.js
@@ -62,8 +62,8 @@
 }
 
 // constructor
-PIXI.TilingSprite.constructor = PIXI.TilingSprite;
 PIXI.TilingSprite.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.TilingSprite.prototype.constructor = PIXI.TilingSprite;
 
 /**
  * Sets the texture of the tiling sprite
diff --git a/src/pixi/loaders/AssetLoader.js b/src/pixi/loaders/AssetLoader.js
index 7936b83..168a5f8 100644
--- a/src/pixi/loaders/AssetLoader.js
+++ b/src/pixi/loaders/AssetLoader.js
@@ -69,7 +69,7 @@
  */
 
 // constructor
-PIXI.AssetLoader.constructor = PIXI.AssetLoader;
+PIXI.AssetLoader.prototype.constructor = PIXI.AssetLoader;
 
 /**
  * Starts loading the assets sequentially
diff --git a/src/pixi/loaders/BitmapFontLoader.js b/src/pixi/loaders/BitmapFontLoader.js
index af08b83..4afd8aa 100644
--- a/src/pixi/loaders/BitmapFontLoader.js
+++ b/src/pixi/loaders/BitmapFontLoader.js
@@ -58,7 +58,7 @@
 };
 
 // constructor
-PIXI.BitmapFontLoader.constructor = PIXI.BitmapFontLoader;
+PIXI.BitmapFontLoader.prototype.constructor = PIXI.BitmapFontLoader;
 
 /**
  * Loads the XML font data
diff --git a/src/pixi/loaders/ImageLoader.js b/src/pixi/loaders/ImageLoader.js
index 942b009..971c012 100644
--- a/src/pixi/loaders/ImageLoader.js
+++ b/src/pixi/loaders/ImageLoader.js
@@ -27,7 +27,7 @@
 };
 
 // constructor
-PIXI.ImageLoader.constructor = PIXI.ImageLoader;
+PIXI.ImageLoader.prototype.constructor = PIXI.ImageLoader;
 
 /**
  * Loads image or takes it from cache
diff --git a/src/pixi/loaders/JsonLoader.js b/src/pixi/loaders/JsonLoader.js
index 1fee06b..1f4ecfe 100644
--- a/src/pixi/loaders/JsonLoader.js
+++ b/src/pixi/loaders/JsonLoader.js
@@ -53,7 +53,7 @@
 };
 
 // constructor
-PIXI.JsonLoader.constructor = PIXI.JsonLoader;
+PIXI.JsonLoader.prototype.constructor = PIXI.JsonLoader;
 
 /**
  * Loads the JSON data
diff --git a/src/pixi/loaders/SpineLoader.js b/src/pixi/loaders/SpineLoader.js
index ce32257..f5e16b0 100644
--- a/src/pixi/loaders/SpineLoader.js
+++ b/src/pixi/loaders/SpineLoader.js
@@ -51,7 +51,7 @@
 	this.loaded = false;
 }
 
-PIXI.SpineLoader.constructor = PIXI.SpineLoader;
+PIXI.SpineLoader.prototype.constructor = PIXI.SpineLoader;
 
 /**
  * Loads the JSON data
diff --git a/src/pixi/loaders/SpriteSheetLoader.js b/src/pixi/loaders/SpriteSheetLoader.js
index 5495f57..169fb70 100644
--- a/src/pixi/loaders/SpriteSheetLoader.js
+++ b/src/pixi/loaders/SpriteSheetLoader.js
@@ -69,7 +69,7 @@
 };
 
 // constructor
-PIXI.SpriteSheetLoader.constructor = PIXI.SpriteSheetLoader;
+PIXI.SpriteSheetLoader.prototype.constructor = PIXI.SpriteSheetLoader;
 
 /**
  * This will begin loading the JSON file
diff --git a/src/pixi/primitives/Graphics.js b/src/pixi/primitives/Graphics.js
index 768fede..7a80553 100644
--- a/src/pixi/primitives/Graphics.js
+++ b/src/pixi/primitives/Graphics.js
@@ -62,8 +62,8 @@
 }
 
 // constructor
-PIXI.Graphics.constructor = PIXI.Graphics;
 PIXI.Graphics.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Graphics.prototype.constructor = PIXI.Graphics;
 
 /**
  * Specifies a line style used for subsequent calls to Graphics methods such as the lineTo() method or the drawCircle() method.
diff --git a/src/pixi/renderers/canvas/CanvasRenderer.js b/src/pixi/renderers/canvas/CanvasRenderer.js
index d1be4b2..060327d 100644
--- a/src/pixi/renderers/canvas/CanvasRenderer.js
+++ b/src/pixi/renderers/canvas/CanvasRenderer.js
@@ -61,7 +61,7 @@
 }
 
 // constructor
-PIXI.CanvasRenderer.constructor = PIXI.CanvasRenderer;
+PIXI.CanvasRenderer.prototype.constructor = PIXI.CanvasRenderer;
 
 /**
  * Renders the stage to its canvas view
diff --git a/src/pixi/renderers/webgl/WebGLBatch.js b/src/pixi/renderers/webgl/WebGLBatch.js
index 1eca2fa..f452d37 100644
--- a/src/pixi/renderers/webgl/WebGLBatch.js
+++ b/src/pixi/renderers/webgl/WebGLBatch.js
@@ -66,7 +66,7 @@
 }
 
 // constructor
-PIXI.WebGLBatch.constructor = PIXI.WebGLBatch;
+PIXI.WebGLBatch.prototype.constructor = PIXI.WebGLBatch;
 
 /**
  * Cleans the batch so that is can be returned to an object pool and reused
diff --git a/src/pixi/renderers/webgl/WebGLRenderGroup.js b/src/pixi/renderers/webgl/WebGLRenderGroup.js
index 277d893..a4ad4e9 100644
--- a/src/pixi/renderers/webgl/WebGLRenderGroup.js
+++ b/src/pixi/renderers/webgl/WebGLRenderGroup.js
@@ -26,7 +26,7 @@
 }
 
 // constructor
-PIXI.WebGLRenderGroup.constructor = PIXI.WebGLRenderGroup;
+PIXI.WebGLRenderGroup.prototype.constructor = PIXI.WebGLRenderGroup;
 
 /**
  * Add a display object to the webgl renderer
diff --git a/src/pixi/renderers/webgl/WebGLRenderer.js b/src/pixi/renderers/webgl/WebGLRenderer.js
index 5ea5adc..2ecb971 100644
--- a/src/pixi/renderers/webgl/WebGLRenderer.js
+++ b/src/pixi/renderers/webgl/WebGLRenderer.js
@@ -81,7 +81,7 @@
 }
 
 // constructor
-PIXI.WebGLRenderer.constructor = PIXI.WebGLRenderer;
+PIXI.WebGLRenderer.prototype.constructor = PIXI.WebGLRenderer;
 
 /**
  * Gets a new WebGLBatch from the pool
diff --git a/src/pixi/text/BitmapText.js b/src/pixi/text/BitmapText.js
index d982d1d..b667172 100644
--- a/src/pixi/text/BitmapText.js
+++ b/src/pixi/text/BitmapText.js
@@ -28,8 +28,8 @@
 };
 
 // constructor
-PIXI.BitmapText.constructor = PIXI.BitmapText;
 PIXI.BitmapText.prototype = Object.create(PIXI.DisplayObjectContainer.prototype);
+PIXI.BitmapText.prototype.constructor = PIXI.BitmapText;
 
 /**
  * Set the copy for the text object

diff --git a/src/pixi/InteractionManager.js b/src/pixi/InteractionManager.js
index bdbb276..e125dc8 100644
--- a/src/pixi/InteractionManager.js
+++ b/src/pixi/InteractionManager.js
@@ -53,7 +53,7 @@
 }
 
 // constructor
-PIXI.InteractionManager.constructor = PIXI.InteractionManager;
+PIXI.InteractionManager.prototype.constructor = PIXI.InteractionManager;
 
 /**
  * Collects an interactive sprite recursively to have their interactions managed
@@ -618,4 +618,4 @@
 }
 
 // constructor
-PIXI.InteractionData.constructor = PIXI.InteractionData;
+PIXI.InteractionData.prototype.constructor = PIXI.InteractionData;
diff --git a/src/pixi/core/Circle.js b/src/pixi/core/Circle.js
index 6c3433d..a9ceed0 100644
--- a/src/pixi/core/Circle.js
+++ b/src/pixi/core/Circle.js
@@ -69,5 +69,5 @@
     return (dx + dy <= r2);
 }
 
-PIXI.Circle.constructor = PIXI.Circle;
+PIXI.Circle.prototype.constructor = PIXI.Circle;
 
diff --git a/src/pixi/core/Ellipse.js b/src/pixi/core/Ellipse.js
index a0703ad..dd369da 100644
--- a/src/pixi/core/Ellipse.js
+++ b/src/pixi/core/Ellipse.js
@@ -83,5 +83,5 @@
     return new PIXI.Rectangle(this.x, this.y, this.width, this.height);
 }
 
-PIXI.Ellipse.constructor = PIXI.Ellipse;
+PIXI.Ellipse.prototype.constructor = PIXI.Ellipse;
 
diff --git a/src/pixi/core/Point.js b/src/pixi/core/Point.js
index 294a8f8..8520861 100644
--- a/src/pixi/core/Point.js
+++ b/src/pixi/core/Point.js
@@ -39,5 +39,5 @@
 }
 
 // constructor
-PIXI.Point.constructor = PIXI.Point;
+PIXI.Point.prototype.constructor = PIXI.Point;
 
diff --git a/src/pixi/core/Polygon.js b/src/pixi/core/Polygon.js
index 5c1db06..47cf17b 100644
--- a/src/pixi/core/Polygon.js
+++ b/src/pixi/core/Polygon.js
@@ -73,5 +73,5 @@
     return inside;
 }
 
-PIXI.Polygon.constructor = PIXI.Polygon;
+PIXI.Polygon.prototype.constructor = PIXI.Polygon;
 
diff --git a/src/pixi/core/Rectangle.js b/src/pixi/core/Rectangle.js
index 64acf7a..66fb5d6 100644
--- a/src/pixi/core/Rectangle.js
+++ b/src/pixi/core/Rectangle.js
@@ -82,5 +82,5 @@
 }
 
 // constructor
-PIXI.Rectangle.constructor = PIXI.Rectangle;
+PIXI.Rectangle.prototype.constructor = PIXI.Rectangle;
 
diff --git a/src/pixi/display/DisplayObject.js b/src/pixi/display/DisplayObject.js
index 3b51aaf..f8ee024 100644
--- a/src/pixi/display/DisplayObject.js
+++ b/src/pixi/display/DisplayObject.js
@@ -258,7 +258,7 @@
 }
 
 // constructor
-PIXI.DisplayObject.constructor = PIXI.DisplayObject;
+PIXI.DisplayObject.prototype.constructor = PIXI.DisplayObject;
 
 //TODO make visible a getter setter
 /*
diff --git a/src/pixi/display/DisplayObjectContainer.js b/src/pixi/display/DisplayObjectContainer.js
index 4a3a204..649169f 100644
--- a/src/pixi/display/DisplayObjectContainer.js
+++ b/src/pixi/display/DisplayObjectContainer.js
@@ -26,8 +26,8 @@
 }
 
 // constructor
-PIXI.DisplayObjectContainer.constructor = PIXI.DisplayObjectContainer;
 PIXI.DisplayObjectContainer.prototype = Object.create( PIXI.DisplayObject.prototype );
+PIXI.DisplayObjectContainer.prototype.constructor = PIXI.DisplayObjectContainer;
 
 //TODO make visible a getter setter
 /*
diff --git a/src/pixi/display/MovieClip.js b/src/pixi/display/MovieClip.js
index b435ffe..7a77856 100644
--- a/src/pixi/display/MovieClip.js
+++ b/src/pixi/display/MovieClip.js
@@ -69,8 +69,8 @@
 }
 
 // constructor
-PIXI.MovieClip.constructor = PIXI.MovieClip;
 PIXI.MovieClip.prototype = Object.create( PIXI.Sprite.prototype );
+PIXI.MovieClip.prototype.constructor = PIXI.MovieClip;
 
 /**
  * Stops the MovieClip
diff --git a/src/pixi/display/Sprite.js b/src/pixi/display/Sprite.js
index 945331a..0713205 100644
--- a/src/pixi/display/Sprite.js
+++ b/src/pixi/display/Sprite.js
@@ -80,8 +80,8 @@
 }
 
 // constructor
-PIXI.Sprite.constructor = PIXI.Sprite;
 PIXI.Sprite.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Sprite.prototype.constructor = PIXI.Sprite;
 
 /**
  * The width of the sprite, setting this will actually modify the scale to acheive the value set
diff --git a/src/pixi/display/Stage.js b/src/pixi/display/Stage.js
index 447d77a..681c91b 100644
--- a/src/pixi/display/Stage.js
+++ b/src/pixi/display/Stage.js
@@ -65,8 +65,8 @@
 }
 
 // constructor
-PIXI.Stage.constructor = PIXI.Stage;
 PIXI.Stage.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Stage.prototype.constructor = PIXI.Stage;
 
 /*
  * Updates the object transform for rendering
diff --git a/src/pixi/extras/CustomRenderable.js b/src/pixi/extras/CustomRenderable.js
index 7477195..eb0dc5b 100644
--- a/src/pixi/extras/CustomRenderable.js
+++ b/src/pixi/extras/CustomRenderable.js
@@ -17,8 +17,8 @@
 }
 
 // constructor
-PIXI.CustomRenderable.constructor = PIXI.CustomRenderable;
 PIXI.CustomRenderable.prototype = Object.create( PIXI.DisplayObject.prototype );
+PIXI.CustomRenderable.prototype.constructor = PIXI.CustomRenderable;
 
 /**
  * If this object is being rendered by a CanvasRenderer it will call this callback
diff --git a/src/pixi/extras/Rope.js b/src/pixi/extras/Rope.js
index 879fd13..1c057c8 100644
--- a/src/pixi/extras/Rope.js
+++ b/src/pixi/extras/Rope.js
@@ -29,8 +29,8 @@
 
 
 // constructor
-PIXI.Rope.constructor = PIXI.Rope;
 PIXI.Rope.prototype = Object.create( PIXI.Strip.prototype );
+PIXI.Rope.prototype.constructor = PIXI.Rope;
 
 PIXI.Rope.prototype.refresh = function()
 {
diff --git a/src/pixi/extras/Spine.js b/src/pixi/extras/Spine.js
index 006fb6d..5ee161a 100644
--- a/src/pixi/extras/Spine.js
+++ b/src/pixi/extras/Spine.js
@@ -58,8 +58,8 @@
 	};
 }
 
-PIXI.Spine.constructor = PIXI.Spine;
 PIXI.Spine.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Spine.prototype.constructor = PIXI.Spine;
 
 /*
  * Updates the object transform for rendering
diff --git a/src/pixi/extras/Strip.js b/src/pixi/extras/Strip.js
index d2a6937..1e5ba3b 100644
--- a/src/pixi/extras/Strip.js
+++ b/src/pixi/extras/Strip.js
@@ -66,8 +66,8 @@
 }
 
 // constructor
-PIXI.Strip.constructor = PIXI.Strip;
 PIXI.Strip.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Strip.prototype.constructor = PIXI.Strip;
 
 PIXI.Strip.prototype.setTexture = function(texture)
 {
diff --git a/src/pixi/extras/TilingSprite.js b/src/pixi/extras/TilingSprite.js
index 9a49e1c..2cb17fa 100644
--- a/src/pixi/extras/TilingSprite.js
+++ b/src/pixi/extras/TilingSprite.js
@@ -62,8 +62,8 @@
 }
 
 // constructor
-PIXI.TilingSprite.constructor = PIXI.TilingSprite;
 PIXI.TilingSprite.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.TilingSprite.prototype.constructor = PIXI.TilingSprite;
 
 /**
  * Sets the texture of the tiling sprite
diff --git a/src/pixi/loaders/AssetLoader.js b/src/pixi/loaders/AssetLoader.js
index 7936b83..168a5f8 100644
--- a/src/pixi/loaders/AssetLoader.js
+++ b/src/pixi/loaders/AssetLoader.js
@@ -69,7 +69,7 @@
  */
 
 // constructor
-PIXI.AssetLoader.constructor = PIXI.AssetLoader;
+PIXI.AssetLoader.prototype.constructor = PIXI.AssetLoader;
 
 /**
  * Starts loading the assets sequentially
diff --git a/src/pixi/loaders/BitmapFontLoader.js b/src/pixi/loaders/BitmapFontLoader.js
index af08b83..4afd8aa 100644
--- a/src/pixi/loaders/BitmapFontLoader.js
+++ b/src/pixi/loaders/BitmapFontLoader.js
@@ -58,7 +58,7 @@
 };
 
 // constructor
-PIXI.BitmapFontLoader.constructor = PIXI.BitmapFontLoader;
+PIXI.BitmapFontLoader.prototype.constructor = PIXI.BitmapFontLoader;
 
 /**
  * Loads the XML font data
diff --git a/src/pixi/loaders/ImageLoader.js b/src/pixi/loaders/ImageLoader.js
index 942b009..971c012 100644
--- a/src/pixi/loaders/ImageLoader.js
+++ b/src/pixi/loaders/ImageLoader.js
@@ -27,7 +27,7 @@
 };
 
 // constructor
-PIXI.ImageLoader.constructor = PIXI.ImageLoader;
+PIXI.ImageLoader.prototype.constructor = PIXI.ImageLoader;
 
 /**
  * Loads image or takes it from cache
diff --git a/src/pixi/loaders/JsonLoader.js b/src/pixi/loaders/JsonLoader.js
index 1fee06b..1f4ecfe 100644
--- a/src/pixi/loaders/JsonLoader.js
+++ b/src/pixi/loaders/JsonLoader.js
@@ -53,7 +53,7 @@
 };
 
 // constructor
-PIXI.JsonLoader.constructor = PIXI.JsonLoader;
+PIXI.JsonLoader.prototype.constructor = PIXI.JsonLoader;
 
 /**
  * Loads the JSON data
diff --git a/src/pixi/loaders/SpineLoader.js b/src/pixi/loaders/SpineLoader.js
index ce32257..f5e16b0 100644
--- a/src/pixi/loaders/SpineLoader.js
+++ b/src/pixi/loaders/SpineLoader.js
@@ -51,7 +51,7 @@
 	this.loaded = false;
 }
 
-PIXI.SpineLoader.constructor = PIXI.SpineLoader;
+PIXI.SpineLoader.prototype.constructor = PIXI.SpineLoader;
 
 /**
  * Loads the JSON data
diff --git a/src/pixi/loaders/SpriteSheetLoader.js b/src/pixi/loaders/SpriteSheetLoader.js
index 5495f57..169fb70 100644
--- a/src/pixi/loaders/SpriteSheetLoader.js
+++ b/src/pixi/loaders/SpriteSheetLoader.js
@@ -69,7 +69,7 @@
 };
 
 // constructor
-PIXI.SpriteSheetLoader.constructor = PIXI.SpriteSheetLoader;
+PIXI.SpriteSheetLoader.prototype.constructor = PIXI.SpriteSheetLoader;
 
 /**
  * This will begin loading the JSON file
diff --git a/src/pixi/primitives/Graphics.js b/src/pixi/primitives/Graphics.js
index 768fede..7a80553 100644
--- a/src/pixi/primitives/Graphics.js
+++ b/src/pixi/primitives/Graphics.js
@@ -62,8 +62,8 @@
 }
 
 // constructor
-PIXI.Graphics.constructor = PIXI.Graphics;
 PIXI.Graphics.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Graphics.prototype.constructor = PIXI.Graphics;
 
 /**
  * Specifies a line style used for subsequent calls to Graphics methods such as the lineTo() method or the drawCircle() method.
diff --git a/src/pixi/renderers/canvas/CanvasRenderer.js b/src/pixi/renderers/canvas/CanvasRenderer.js
index d1be4b2..060327d 100644
--- a/src/pixi/renderers/canvas/CanvasRenderer.js
+++ b/src/pixi/renderers/canvas/CanvasRenderer.js
@@ -61,7 +61,7 @@
 }
 
 // constructor
-PIXI.CanvasRenderer.constructor = PIXI.CanvasRenderer;
+PIXI.CanvasRenderer.prototype.constructor = PIXI.CanvasRenderer;
 
 /**
  * Renders the stage to its canvas view
diff --git a/src/pixi/renderers/webgl/WebGLBatch.js b/src/pixi/renderers/webgl/WebGLBatch.js
index 1eca2fa..f452d37 100644
--- a/src/pixi/renderers/webgl/WebGLBatch.js
+++ b/src/pixi/renderers/webgl/WebGLBatch.js
@@ -66,7 +66,7 @@
 }
 
 // constructor
-PIXI.WebGLBatch.constructor = PIXI.WebGLBatch;
+PIXI.WebGLBatch.prototype.constructor = PIXI.WebGLBatch;
 
 /**
  * Cleans the batch so that is can be returned to an object pool and reused
diff --git a/src/pixi/renderers/webgl/WebGLRenderGroup.js b/src/pixi/renderers/webgl/WebGLRenderGroup.js
index 277d893..a4ad4e9 100644
--- a/src/pixi/renderers/webgl/WebGLRenderGroup.js
+++ b/src/pixi/renderers/webgl/WebGLRenderGroup.js
@@ -26,7 +26,7 @@
 }
 
 // constructor
-PIXI.WebGLRenderGroup.constructor = PIXI.WebGLRenderGroup;
+PIXI.WebGLRenderGroup.prototype.constructor = PIXI.WebGLRenderGroup;
 
 /**
  * Add a display object to the webgl renderer
diff --git a/src/pixi/renderers/webgl/WebGLRenderer.js b/src/pixi/renderers/webgl/WebGLRenderer.js
index 5ea5adc..2ecb971 100644
--- a/src/pixi/renderers/webgl/WebGLRenderer.js
+++ b/src/pixi/renderers/webgl/WebGLRenderer.js
@@ -81,7 +81,7 @@
 }
 
 // constructor
-PIXI.WebGLRenderer.constructor = PIXI.WebGLRenderer;
+PIXI.WebGLRenderer.prototype.constructor = PIXI.WebGLRenderer;
 
 /**
  * Gets a new WebGLBatch from the pool
diff --git a/src/pixi/text/BitmapText.js b/src/pixi/text/BitmapText.js
index d982d1d..b667172 100644
--- a/src/pixi/text/BitmapText.js
+++ b/src/pixi/text/BitmapText.js
@@ -28,8 +28,8 @@
 };
 
 // constructor
-PIXI.BitmapText.constructor = PIXI.BitmapText;
 PIXI.BitmapText.prototype = Object.create(PIXI.DisplayObjectContainer.prototype);
+PIXI.BitmapText.prototype.constructor = PIXI.BitmapText;
 
 /**
  * Set the copy for the text object
diff --git a/src/pixi/text/Text.js b/src/pixi/text/Text.js
index 0b62bc7..4a3d89f 100644
--- a/src/pixi/text/Text.js
+++ b/src/pixi/text/Text.js
@@ -32,8 +32,8 @@
 };
 
 // constructor
-PIXI.Text.constructor = PIXI.Text;
 PIXI.Text.prototype = Object.create(PIXI.Sprite.prototype);
+PIXI.Text.prototype.constructor = PIXI.Text;
 
 /**
  * Set the style of the text

diff --git a/src/pixi/InteractionManager.js b/src/pixi/InteractionManager.js
index bdbb276..e125dc8 100644
--- a/src/pixi/InteractionManager.js
+++ b/src/pixi/InteractionManager.js
@@ -53,7 +53,7 @@
 }
 
 // constructor
-PIXI.InteractionManager.constructor = PIXI.InteractionManager;
+PIXI.InteractionManager.prototype.constructor = PIXI.InteractionManager;
 
 /**
  * Collects an interactive sprite recursively to have their interactions managed
@@ -618,4 +618,4 @@
 }
 
 // constructor
-PIXI.InteractionData.constructor = PIXI.InteractionData;
+PIXI.InteractionData.prototype.constructor = PIXI.InteractionData;
diff --git a/src/pixi/core/Circle.js b/src/pixi/core/Circle.js
index 6c3433d..a9ceed0 100644
--- a/src/pixi/core/Circle.js
+++ b/src/pixi/core/Circle.js
@@ -69,5 +69,5 @@
     return (dx + dy <= r2);
 }
 
-PIXI.Circle.constructor = PIXI.Circle;
+PIXI.Circle.prototype.constructor = PIXI.Circle;
 
diff --git a/src/pixi/core/Ellipse.js b/src/pixi/core/Ellipse.js
index a0703ad..dd369da 100644
--- a/src/pixi/core/Ellipse.js
+++ b/src/pixi/core/Ellipse.js
@@ -83,5 +83,5 @@
     return new PIXI.Rectangle(this.x, this.y, this.width, this.height);
 }
 
-PIXI.Ellipse.constructor = PIXI.Ellipse;
+PIXI.Ellipse.prototype.constructor = PIXI.Ellipse;
 
diff --git a/src/pixi/core/Point.js b/src/pixi/core/Point.js
index 294a8f8..8520861 100644
--- a/src/pixi/core/Point.js
+++ b/src/pixi/core/Point.js
@@ -39,5 +39,5 @@
 }
 
 // constructor
-PIXI.Point.constructor = PIXI.Point;
+PIXI.Point.prototype.constructor = PIXI.Point;
 
diff --git a/src/pixi/core/Polygon.js b/src/pixi/core/Polygon.js
index 5c1db06..47cf17b 100644
--- a/src/pixi/core/Polygon.js
+++ b/src/pixi/core/Polygon.js
@@ -73,5 +73,5 @@
     return inside;
 }
 
-PIXI.Polygon.constructor = PIXI.Polygon;
+PIXI.Polygon.prototype.constructor = PIXI.Polygon;
 
diff --git a/src/pixi/core/Rectangle.js b/src/pixi/core/Rectangle.js
index 64acf7a..66fb5d6 100644
--- a/src/pixi/core/Rectangle.js
+++ b/src/pixi/core/Rectangle.js
@@ -82,5 +82,5 @@
 }
 
 // constructor
-PIXI.Rectangle.constructor = PIXI.Rectangle;
+PIXI.Rectangle.prototype.constructor = PIXI.Rectangle;
 
diff --git a/src/pixi/display/DisplayObject.js b/src/pixi/display/DisplayObject.js
index 3b51aaf..f8ee024 100644
--- a/src/pixi/display/DisplayObject.js
+++ b/src/pixi/display/DisplayObject.js
@@ -258,7 +258,7 @@
 }
 
 // constructor
-PIXI.DisplayObject.constructor = PIXI.DisplayObject;
+PIXI.DisplayObject.prototype.constructor = PIXI.DisplayObject;
 
 //TODO make visible a getter setter
 /*
diff --git a/src/pixi/display/DisplayObjectContainer.js b/src/pixi/display/DisplayObjectContainer.js
index 4a3a204..649169f 100644
--- a/src/pixi/display/DisplayObjectContainer.js
+++ b/src/pixi/display/DisplayObjectContainer.js
@@ -26,8 +26,8 @@
 }
 
 // constructor
-PIXI.DisplayObjectContainer.constructor = PIXI.DisplayObjectContainer;
 PIXI.DisplayObjectContainer.prototype = Object.create( PIXI.DisplayObject.prototype );
+PIXI.DisplayObjectContainer.prototype.constructor = PIXI.DisplayObjectContainer;
 
 //TODO make visible a getter setter
 /*
diff --git a/src/pixi/display/MovieClip.js b/src/pixi/display/MovieClip.js
index b435ffe..7a77856 100644
--- a/src/pixi/display/MovieClip.js
+++ b/src/pixi/display/MovieClip.js
@@ -69,8 +69,8 @@
 }
 
 // constructor
-PIXI.MovieClip.constructor = PIXI.MovieClip;
 PIXI.MovieClip.prototype = Object.create( PIXI.Sprite.prototype );
+PIXI.MovieClip.prototype.constructor = PIXI.MovieClip;
 
 /**
  * Stops the MovieClip
diff --git a/src/pixi/display/Sprite.js b/src/pixi/display/Sprite.js
index 945331a..0713205 100644
--- a/src/pixi/display/Sprite.js
+++ b/src/pixi/display/Sprite.js
@@ -80,8 +80,8 @@
 }
 
 // constructor
-PIXI.Sprite.constructor = PIXI.Sprite;
 PIXI.Sprite.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Sprite.prototype.constructor = PIXI.Sprite;
 
 /**
  * The width of the sprite, setting this will actually modify the scale to acheive the value set
diff --git a/src/pixi/display/Stage.js b/src/pixi/display/Stage.js
index 447d77a..681c91b 100644
--- a/src/pixi/display/Stage.js
+++ b/src/pixi/display/Stage.js
@@ -65,8 +65,8 @@
 }
 
 // constructor
-PIXI.Stage.constructor = PIXI.Stage;
 PIXI.Stage.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Stage.prototype.constructor = PIXI.Stage;
 
 /*
  * Updates the object transform for rendering
diff --git a/src/pixi/extras/CustomRenderable.js b/src/pixi/extras/CustomRenderable.js
index 7477195..eb0dc5b 100644
--- a/src/pixi/extras/CustomRenderable.js
+++ b/src/pixi/extras/CustomRenderable.js
@@ -17,8 +17,8 @@
 }
 
 // constructor
-PIXI.CustomRenderable.constructor = PIXI.CustomRenderable;
 PIXI.CustomRenderable.prototype = Object.create( PIXI.DisplayObject.prototype );
+PIXI.CustomRenderable.prototype.constructor = PIXI.CustomRenderable;
 
 /**
  * If this object is being rendered by a CanvasRenderer it will call this callback
diff --git a/src/pixi/extras/Rope.js b/src/pixi/extras/Rope.js
index 879fd13..1c057c8 100644
--- a/src/pixi/extras/Rope.js
+++ b/src/pixi/extras/Rope.js
@@ -29,8 +29,8 @@
 
 
 // constructor
-PIXI.Rope.constructor = PIXI.Rope;
 PIXI.Rope.prototype = Object.create( PIXI.Strip.prototype );
+PIXI.Rope.prototype.constructor = PIXI.Rope;
 
 PIXI.Rope.prototype.refresh = function()
 {
diff --git a/src/pixi/extras/Spine.js b/src/pixi/extras/Spine.js
index 006fb6d..5ee161a 100644
--- a/src/pixi/extras/Spine.js
+++ b/src/pixi/extras/Spine.js
@@ -58,8 +58,8 @@
 	};
 }
 
-PIXI.Spine.constructor = PIXI.Spine;
 PIXI.Spine.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Spine.prototype.constructor = PIXI.Spine;
 
 /*
  * Updates the object transform for rendering
diff --git a/src/pixi/extras/Strip.js b/src/pixi/extras/Strip.js
index d2a6937..1e5ba3b 100644
--- a/src/pixi/extras/Strip.js
+++ b/src/pixi/extras/Strip.js
@@ -66,8 +66,8 @@
 }
 
 // constructor
-PIXI.Strip.constructor = PIXI.Strip;
 PIXI.Strip.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Strip.prototype.constructor = PIXI.Strip;
 
 PIXI.Strip.prototype.setTexture = function(texture)
 {
diff --git a/src/pixi/extras/TilingSprite.js b/src/pixi/extras/TilingSprite.js
index 9a49e1c..2cb17fa 100644
--- a/src/pixi/extras/TilingSprite.js
+++ b/src/pixi/extras/TilingSprite.js
@@ -62,8 +62,8 @@
 }
 
 // constructor
-PIXI.TilingSprite.constructor = PIXI.TilingSprite;
 PIXI.TilingSprite.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.TilingSprite.prototype.constructor = PIXI.TilingSprite;
 
 /**
  * Sets the texture of the tiling sprite
diff --git a/src/pixi/loaders/AssetLoader.js b/src/pixi/loaders/AssetLoader.js
index 7936b83..168a5f8 100644
--- a/src/pixi/loaders/AssetLoader.js
+++ b/src/pixi/loaders/AssetLoader.js
@@ -69,7 +69,7 @@
  */
 
 // constructor
-PIXI.AssetLoader.constructor = PIXI.AssetLoader;
+PIXI.AssetLoader.prototype.constructor = PIXI.AssetLoader;
 
 /**
  * Starts loading the assets sequentially
diff --git a/src/pixi/loaders/BitmapFontLoader.js b/src/pixi/loaders/BitmapFontLoader.js
index af08b83..4afd8aa 100644
--- a/src/pixi/loaders/BitmapFontLoader.js
+++ b/src/pixi/loaders/BitmapFontLoader.js
@@ -58,7 +58,7 @@
 };
 
 // constructor
-PIXI.BitmapFontLoader.constructor = PIXI.BitmapFontLoader;
+PIXI.BitmapFontLoader.prototype.constructor = PIXI.BitmapFontLoader;
 
 /**
  * Loads the XML font data
diff --git a/src/pixi/loaders/ImageLoader.js b/src/pixi/loaders/ImageLoader.js
index 942b009..971c012 100644
--- a/src/pixi/loaders/ImageLoader.js
+++ b/src/pixi/loaders/ImageLoader.js
@@ -27,7 +27,7 @@
 };
 
 // constructor
-PIXI.ImageLoader.constructor = PIXI.ImageLoader;
+PIXI.ImageLoader.prototype.constructor = PIXI.ImageLoader;
 
 /**
  * Loads image or takes it from cache
diff --git a/src/pixi/loaders/JsonLoader.js b/src/pixi/loaders/JsonLoader.js
index 1fee06b..1f4ecfe 100644
--- a/src/pixi/loaders/JsonLoader.js
+++ b/src/pixi/loaders/JsonLoader.js
@@ -53,7 +53,7 @@
 };
 
 // constructor
-PIXI.JsonLoader.constructor = PIXI.JsonLoader;
+PIXI.JsonLoader.prototype.constructor = PIXI.JsonLoader;
 
 /**
  * Loads the JSON data
diff --git a/src/pixi/loaders/SpineLoader.js b/src/pixi/loaders/SpineLoader.js
index ce32257..f5e16b0 100644
--- a/src/pixi/loaders/SpineLoader.js
+++ b/src/pixi/loaders/SpineLoader.js
@@ -51,7 +51,7 @@
 	this.loaded = false;
 }
 
-PIXI.SpineLoader.constructor = PIXI.SpineLoader;
+PIXI.SpineLoader.prototype.constructor = PIXI.SpineLoader;
 
 /**
  * Loads the JSON data
diff --git a/src/pixi/loaders/SpriteSheetLoader.js b/src/pixi/loaders/SpriteSheetLoader.js
index 5495f57..169fb70 100644
--- a/src/pixi/loaders/SpriteSheetLoader.js
+++ b/src/pixi/loaders/SpriteSheetLoader.js
@@ -69,7 +69,7 @@
 };
 
 // constructor
-PIXI.SpriteSheetLoader.constructor = PIXI.SpriteSheetLoader;
+PIXI.SpriteSheetLoader.prototype.constructor = PIXI.SpriteSheetLoader;
 
 /**
  * This will begin loading the JSON file
diff --git a/src/pixi/primitives/Graphics.js b/src/pixi/primitives/Graphics.js
index 768fede..7a80553 100644
--- a/src/pixi/primitives/Graphics.js
+++ b/src/pixi/primitives/Graphics.js
@@ -62,8 +62,8 @@
 }
 
 // constructor
-PIXI.Graphics.constructor = PIXI.Graphics;
 PIXI.Graphics.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Graphics.prototype.constructor = PIXI.Graphics;
 
 /**
  * Specifies a line style used for subsequent calls to Graphics methods such as the lineTo() method or the drawCircle() method.
diff --git a/src/pixi/renderers/canvas/CanvasRenderer.js b/src/pixi/renderers/canvas/CanvasRenderer.js
index d1be4b2..060327d 100644
--- a/src/pixi/renderers/canvas/CanvasRenderer.js
+++ b/src/pixi/renderers/canvas/CanvasRenderer.js
@@ -61,7 +61,7 @@
 }
 
 // constructor
-PIXI.CanvasRenderer.constructor = PIXI.CanvasRenderer;
+PIXI.CanvasRenderer.prototype.constructor = PIXI.CanvasRenderer;
 
 /**
  * Renders the stage to its canvas view
diff --git a/src/pixi/renderers/webgl/WebGLBatch.js b/src/pixi/renderers/webgl/WebGLBatch.js
index 1eca2fa..f452d37 100644
--- a/src/pixi/renderers/webgl/WebGLBatch.js
+++ b/src/pixi/renderers/webgl/WebGLBatch.js
@@ -66,7 +66,7 @@
 }
 
 // constructor
-PIXI.WebGLBatch.constructor = PIXI.WebGLBatch;
+PIXI.WebGLBatch.prototype.constructor = PIXI.WebGLBatch;
 
 /**
  * Cleans the batch so that is can be returned to an object pool and reused
diff --git a/src/pixi/renderers/webgl/WebGLRenderGroup.js b/src/pixi/renderers/webgl/WebGLRenderGroup.js
index 277d893..a4ad4e9 100644
--- a/src/pixi/renderers/webgl/WebGLRenderGroup.js
+++ b/src/pixi/renderers/webgl/WebGLRenderGroup.js
@@ -26,7 +26,7 @@
 }
 
 // constructor
-PIXI.WebGLRenderGroup.constructor = PIXI.WebGLRenderGroup;
+PIXI.WebGLRenderGroup.prototype.constructor = PIXI.WebGLRenderGroup;
 
 /**
  * Add a display object to the webgl renderer
diff --git a/src/pixi/renderers/webgl/WebGLRenderer.js b/src/pixi/renderers/webgl/WebGLRenderer.js
index 5ea5adc..2ecb971 100644
--- a/src/pixi/renderers/webgl/WebGLRenderer.js
+++ b/src/pixi/renderers/webgl/WebGLRenderer.js
@@ -81,7 +81,7 @@
 }
 
 // constructor
-PIXI.WebGLRenderer.constructor = PIXI.WebGLRenderer;
+PIXI.WebGLRenderer.prototype.constructor = PIXI.WebGLRenderer;
 
 /**
  * Gets a new WebGLBatch from the pool
diff --git a/src/pixi/text/BitmapText.js b/src/pixi/text/BitmapText.js
index d982d1d..b667172 100644
--- a/src/pixi/text/BitmapText.js
+++ b/src/pixi/text/BitmapText.js
@@ -28,8 +28,8 @@
 };
 
 // constructor
-PIXI.BitmapText.constructor = PIXI.BitmapText;
 PIXI.BitmapText.prototype = Object.create(PIXI.DisplayObjectContainer.prototype);
+PIXI.BitmapText.prototype.constructor = PIXI.BitmapText;
 
 /**
  * Set the copy for the text object
diff --git a/src/pixi/text/Text.js b/src/pixi/text/Text.js
index 0b62bc7..4a3d89f 100644
--- a/src/pixi/text/Text.js
+++ b/src/pixi/text/Text.js
@@ -32,8 +32,8 @@
 };
 
 // constructor
-PIXI.Text.constructor = PIXI.Text;
 PIXI.Text.prototype = Object.create(PIXI.Sprite.prototype);
+PIXI.Text.prototype.constructor = PIXI.Text;
 
 /**
  * Set the style of the text
diff --git a/src/pixi/textures/BaseTexture.js b/src/pixi/textures/BaseTexture.js
index 25ff347..4b7e7ac 100644
--- a/src/pixi/textures/BaseTexture.js
+++ b/src/pixi/textures/BaseTexture.js
@@ -94,7 +94,7 @@
 	this._powerOf2 = false;
 }
 
-PIXI.BaseTexture.constructor = PIXI.BaseTexture;
+PIXI.BaseTexture.prototype.constructor = PIXI.BaseTexture;
 
 /**
  * Destroys this base texture

diff --git a/src/pixi/InteractionManager.js b/src/pixi/InteractionManager.js
index bdbb276..e125dc8 100644
--- a/src/pixi/InteractionManager.js
+++ b/src/pixi/InteractionManager.js
@@ -53,7 +53,7 @@
 }
 
 // constructor
-PIXI.InteractionManager.constructor = PIXI.InteractionManager;
+PIXI.InteractionManager.prototype.constructor = PIXI.InteractionManager;
 
 /**
  * Collects an interactive sprite recursively to have their interactions managed
@@ -618,4 +618,4 @@
 }
 
 // constructor
-PIXI.InteractionData.constructor = PIXI.InteractionData;
+PIXI.InteractionData.prototype.constructor = PIXI.InteractionData;
diff --git a/src/pixi/core/Circle.js b/src/pixi/core/Circle.js
index 6c3433d..a9ceed0 100644
--- a/src/pixi/core/Circle.js
+++ b/src/pixi/core/Circle.js
@@ -69,5 +69,5 @@
     return (dx + dy <= r2);
 }
 
-PIXI.Circle.constructor = PIXI.Circle;
+PIXI.Circle.prototype.constructor = PIXI.Circle;
 
diff --git a/src/pixi/core/Ellipse.js b/src/pixi/core/Ellipse.js
index a0703ad..dd369da 100644
--- a/src/pixi/core/Ellipse.js
+++ b/src/pixi/core/Ellipse.js
@@ -83,5 +83,5 @@
     return new PIXI.Rectangle(this.x, this.y, this.width, this.height);
 }
 
-PIXI.Ellipse.constructor = PIXI.Ellipse;
+PIXI.Ellipse.prototype.constructor = PIXI.Ellipse;
 
diff --git a/src/pixi/core/Point.js b/src/pixi/core/Point.js
index 294a8f8..8520861 100644
--- a/src/pixi/core/Point.js
+++ b/src/pixi/core/Point.js
@@ -39,5 +39,5 @@
 }
 
 // constructor
-PIXI.Point.constructor = PIXI.Point;
+PIXI.Point.prototype.constructor = PIXI.Point;
 
diff --git a/src/pixi/core/Polygon.js b/src/pixi/core/Polygon.js
index 5c1db06..47cf17b 100644
--- a/src/pixi/core/Polygon.js
+++ b/src/pixi/core/Polygon.js
@@ -73,5 +73,5 @@
     return inside;
 }
 
-PIXI.Polygon.constructor = PIXI.Polygon;
+PIXI.Polygon.prototype.constructor = PIXI.Polygon;
 
diff --git a/src/pixi/core/Rectangle.js b/src/pixi/core/Rectangle.js
index 64acf7a..66fb5d6 100644
--- a/src/pixi/core/Rectangle.js
+++ b/src/pixi/core/Rectangle.js
@@ -82,5 +82,5 @@
 }
 
 // constructor
-PIXI.Rectangle.constructor = PIXI.Rectangle;
+PIXI.Rectangle.prototype.constructor = PIXI.Rectangle;
 
diff --git a/src/pixi/display/DisplayObject.js b/src/pixi/display/DisplayObject.js
index 3b51aaf..f8ee024 100644
--- a/src/pixi/display/DisplayObject.js
+++ b/src/pixi/display/DisplayObject.js
@@ -258,7 +258,7 @@
 }
 
 // constructor
-PIXI.DisplayObject.constructor = PIXI.DisplayObject;
+PIXI.DisplayObject.prototype.constructor = PIXI.DisplayObject;
 
 //TODO make visible a getter setter
 /*
diff --git a/src/pixi/display/DisplayObjectContainer.js b/src/pixi/display/DisplayObjectContainer.js
index 4a3a204..649169f 100644
--- a/src/pixi/display/DisplayObjectContainer.js
+++ b/src/pixi/display/DisplayObjectContainer.js
@@ -26,8 +26,8 @@
 }
 
 // constructor
-PIXI.DisplayObjectContainer.constructor = PIXI.DisplayObjectContainer;
 PIXI.DisplayObjectContainer.prototype = Object.create( PIXI.DisplayObject.prototype );
+PIXI.DisplayObjectContainer.prototype.constructor = PIXI.DisplayObjectContainer;
 
 //TODO make visible a getter setter
 /*
diff --git a/src/pixi/display/MovieClip.js b/src/pixi/display/MovieClip.js
index b435ffe..7a77856 100644
--- a/src/pixi/display/MovieClip.js
+++ b/src/pixi/display/MovieClip.js
@@ -69,8 +69,8 @@
 }
 
 // constructor
-PIXI.MovieClip.constructor = PIXI.MovieClip;
 PIXI.MovieClip.prototype = Object.create( PIXI.Sprite.prototype );
+PIXI.MovieClip.prototype.constructor = PIXI.MovieClip;
 
 /**
  * Stops the MovieClip
diff --git a/src/pixi/display/Sprite.js b/src/pixi/display/Sprite.js
index 945331a..0713205 100644
--- a/src/pixi/display/Sprite.js
+++ b/src/pixi/display/Sprite.js
@@ -80,8 +80,8 @@
 }
 
 // constructor
-PIXI.Sprite.constructor = PIXI.Sprite;
 PIXI.Sprite.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Sprite.prototype.constructor = PIXI.Sprite;
 
 /**
  * The width of the sprite, setting this will actually modify the scale to acheive the value set
diff --git a/src/pixi/display/Stage.js b/src/pixi/display/Stage.js
index 447d77a..681c91b 100644
--- a/src/pixi/display/Stage.js
+++ b/src/pixi/display/Stage.js
@@ -65,8 +65,8 @@
 }
 
 // constructor
-PIXI.Stage.constructor = PIXI.Stage;
 PIXI.Stage.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Stage.prototype.constructor = PIXI.Stage;
 
 /*
  * Updates the object transform for rendering
diff --git a/src/pixi/extras/CustomRenderable.js b/src/pixi/extras/CustomRenderable.js
index 7477195..eb0dc5b 100644
--- a/src/pixi/extras/CustomRenderable.js
+++ b/src/pixi/extras/CustomRenderable.js
@@ -17,8 +17,8 @@
 }
 
 // constructor
-PIXI.CustomRenderable.constructor = PIXI.CustomRenderable;
 PIXI.CustomRenderable.prototype = Object.create( PIXI.DisplayObject.prototype );
+PIXI.CustomRenderable.prototype.constructor = PIXI.CustomRenderable;
 
 /**
  * If this object is being rendered by a CanvasRenderer it will call this callback
diff --git a/src/pixi/extras/Rope.js b/src/pixi/extras/Rope.js
index 879fd13..1c057c8 100644
--- a/src/pixi/extras/Rope.js
+++ b/src/pixi/extras/Rope.js
@@ -29,8 +29,8 @@
 
 
 // constructor
-PIXI.Rope.constructor = PIXI.Rope;
 PIXI.Rope.prototype = Object.create( PIXI.Strip.prototype );
+PIXI.Rope.prototype.constructor = PIXI.Rope;
 
 PIXI.Rope.prototype.refresh = function()
 {
diff --git a/src/pixi/extras/Spine.js b/src/pixi/extras/Spine.js
index 006fb6d..5ee161a 100644
--- a/src/pixi/extras/Spine.js
+++ b/src/pixi/extras/Spine.js
@@ -58,8 +58,8 @@
 	};
 }
 
-PIXI.Spine.constructor = PIXI.Spine;
 PIXI.Spine.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Spine.prototype.constructor = PIXI.Spine;
 
 /*
  * Updates the object transform for rendering
diff --git a/src/pixi/extras/Strip.js b/src/pixi/extras/Strip.js
index d2a6937..1e5ba3b 100644
--- a/src/pixi/extras/Strip.js
+++ b/src/pixi/extras/Strip.js
@@ -66,8 +66,8 @@
 }
 
 // constructor
-PIXI.Strip.constructor = PIXI.Strip;
 PIXI.Strip.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Strip.prototype.constructor = PIXI.Strip;
 
 PIXI.Strip.prototype.setTexture = function(texture)
 {
diff --git a/src/pixi/extras/TilingSprite.js b/src/pixi/extras/TilingSprite.js
index 9a49e1c..2cb17fa 100644
--- a/src/pixi/extras/TilingSprite.js
+++ b/src/pixi/extras/TilingSprite.js
@@ -62,8 +62,8 @@
 }
 
 // constructor
-PIXI.TilingSprite.constructor = PIXI.TilingSprite;
 PIXI.TilingSprite.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.TilingSprite.prototype.constructor = PIXI.TilingSprite;
 
 /**
  * Sets the texture of the tiling sprite
diff --git a/src/pixi/loaders/AssetLoader.js b/src/pixi/loaders/AssetLoader.js
index 7936b83..168a5f8 100644
--- a/src/pixi/loaders/AssetLoader.js
+++ b/src/pixi/loaders/AssetLoader.js
@@ -69,7 +69,7 @@
  */
 
 // constructor
-PIXI.AssetLoader.constructor = PIXI.AssetLoader;
+PIXI.AssetLoader.prototype.constructor = PIXI.AssetLoader;
 
 /**
  * Starts loading the assets sequentially
diff --git a/src/pixi/loaders/BitmapFontLoader.js b/src/pixi/loaders/BitmapFontLoader.js
index af08b83..4afd8aa 100644
--- a/src/pixi/loaders/BitmapFontLoader.js
+++ b/src/pixi/loaders/BitmapFontLoader.js
@@ -58,7 +58,7 @@
 };
 
 // constructor
-PIXI.BitmapFontLoader.constructor = PIXI.BitmapFontLoader;
+PIXI.BitmapFontLoader.prototype.constructor = PIXI.BitmapFontLoader;
 
 /**
  * Loads the XML font data
diff --git a/src/pixi/loaders/ImageLoader.js b/src/pixi/loaders/ImageLoader.js
index 942b009..971c012 100644
--- a/src/pixi/loaders/ImageLoader.js
+++ b/src/pixi/loaders/ImageLoader.js
@@ -27,7 +27,7 @@
 };
 
 // constructor
-PIXI.ImageLoader.constructor = PIXI.ImageLoader;
+PIXI.ImageLoader.prototype.constructor = PIXI.ImageLoader;
 
 /**
  * Loads image or takes it from cache
diff --git a/src/pixi/loaders/JsonLoader.js b/src/pixi/loaders/JsonLoader.js
index 1fee06b..1f4ecfe 100644
--- a/src/pixi/loaders/JsonLoader.js
+++ b/src/pixi/loaders/JsonLoader.js
@@ -53,7 +53,7 @@
 };
 
 // constructor
-PIXI.JsonLoader.constructor = PIXI.JsonLoader;
+PIXI.JsonLoader.prototype.constructor = PIXI.JsonLoader;
 
 /**
  * Loads the JSON data
diff --git a/src/pixi/loaders/SpineLoader.js b/src/pixi/loaders/SpineLoader.js
index ce32257..f5e16b0 100644
--- a/src/pixi/loaders/SpineLoader.js
+++ b/src/pixi/loaders/SpineLoader.js
@@ -51,7 +51,7 @@
 	this.loaded = false;
 }
 
-PIXI.SpineLoader.constructor = PIXI.SpineLoader;
+PIXI.SpineLoader.prototype.constructor = PIXI.SpineLoader;
 
 /**
  * Loads the JSON data
diff --git a/src/pixi/loaders/SpriteSheetLoader.js b/src/pixi/loaders/SpriteSheetLoader.js
index 5495f57..169fb70 100644
--- a/src/pixi/loaders/SpriteSheetLoader.js
+++ b/src/pixi/loaders/SpriteSheetLoader.js
@@ -69,7 +69,7 @@
 };
 
 // constructor
-PIXI.SpriteSheetLoader.constructor = PIXI.SpriteSheetLoader;
+PIXI.SpriteSheetLoader.prototype.constructor = PIXI.SpriteSheetLoader;
 
 /**
  * This will begin loading the JSON file
diff --git a/src/pixi/primitives/Graphics.js b/src/pixi/primitives/Graphics.js
index 768fede..7a80553 100644
--- a/src/pixi/primitives/Graphics.js
+++ b/src/pixi/primitives/Graphics.js
@@ -62,8 +62,8 @@
 }
 
 // constructor
-PIXI.Graphics.constructor = PIXI.Graphics;
 PIXI.Graphics.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Graphics.prototype.constructor = PIXI.Graphics;
 
 /**
  * Specifies a line style used for subsequent calls to Graphics methods such as the lineTo() method or the drawCircle() method.
diff --git a/src/pixi/renderers/canvas/CanvasRenderer.js b/src/pixi/renderers/canvas/CanvasRenderer.js
index d1be4b2..060327d 100644
--- a/src/pixi/renderers/canvas/CanvasRenderer.js
+++ b/src/pixi/renderers/canvas/CanvasRenderer.js
@@ -61,7 +61,7 @@
 }
 
 // constructor
-PIXI.CanvasRenderer.constructor = PIXI.CanvasRenderer;
+PIXI.CanvasRenderer.prototype.constructor = PIXI.CanvasRenderer;
 
 /**
  * Renders the stage to its canvas view
diff --git a/src/pixi/renderers/webgl/WebGLBatch.js b/src/pixi/renderers/webgl/WebGLBatch.js
index 1eca2fa..f452d37 100644
--- a/src/pixi/renderers/webgl/WebGLBatch.js
+++ b/src/pixi/renderers/webgl/WebGLBatch.js
@@ -66,7 +66,7 @@
 }
 
 // constructor
-PIXI.WebGLBatch.constructor = PIXI.WebGLBatch;
+PIXI.WebGLBatch.prototype.constructor = PIXI.WebGLBatch;
 
 /**
  * Cleans the batch so that is can be returned to an object pool and reused
diff --git a/src/pixi/renderers/webgl/WebGLRenderGroup.js b/src/pixi/renderers/webgl/WebGLRenderGroup.js
index 277d893..a4ad4e9 100644
--- a/src/pixi/renderers/webgl/WebGLRenderGroup.js
+++ b/src/pixi/renderers/webgl/WebGLRenderGroup.js
@@ -26,7 +26,7 @@
 }
 
 // constructor
-PIXI.WebGLRenderGroup.constructor = PIXI.WebGLRenderGroup;
+PIXI.WebGLRenderGroup.prototype.constructor = PIXI.WebGLRenderGroup;
 
 /**
  * Add a display object to the webgl renderer
diff --git a/src/pixi/renderers/webgl/WebGLRenderer.js b/src/pixi/renderers/webgl/WebGLRenderer.js
index 5ea5adc..2ecb971 100644
--- a/src/pixi/renderers/webgl/WebGLRenderer.js
+++ b/src/pixi/renderers/webgl/WebGLRenderer.js
@@ -81,7 +81,7 @@
 }
 
 // constructor
-PIXI.WebGLRenderer.constructor = PIXI.WebGLRenderer;
+PIXI.WebGLRenderer.prototype.constructor = PIXI.WebGLRenderer;
 
 /**
  * Gets a new WebGLBatch from the pool
diff --git a/src/pixi/text/BitmapText.js b/src/pixi/text/BitmapText.js
index d982d1d..b667172 100644
--- a/src/pixi/text/BitmapText.js
+++ b/src/pixi/text/BitmapText.js
@@ -28,8 +28,8 @@
 };
 
 // constructor
-PIXI.BitmapText.constructor = PIXI.BitmapText;
 PIXI.BitmapText.prototype = Object.create(PIXI.DisplayObjectContainer.prototype);
+PIXI.BitmapText.prototype.constructor = PIXI.BitmapText;
 
 /**
  * Set the copy for the text object
diff --git a/src/pixi/text/Text.js b/src/pixi/text/Text.js
index 0b62bc7..4a3d89f 100644
--- a/src/pixi/text/Text.js
+++ b/src/pixi/text/Text.js
@@ -32,8 +32,8 @@
 };
 
 // constructor
-PIXI.Text.constructor = PIXI.Text;
 PIXI.Text.prototype = Object.create(PIXI.Sprite.prototype);
+PIXI.Text.prototype.constructor = PIXI.Text;
 
 /**
  * Set the style of the text
diff --git a/src/pixi/textures/BaseTexture.js b/src/pixi/textures/BaseTexture.js
index 25ff347..4b7e7ac 100644
--- a/src/pixi/textures/BaseTexture.js
+++ b/src/pixi/textures/BaseTexture.js
@@ -94,7 +94,7 @@
 	this._powerOf2 = false;
 }
 
-PIXI.BaseTexture.constructor = PIXI.BaseTexture;
+PIXI.BaseTexture.prototype.constructor = PIXI.BaseTexture;
 
 /**
  * Destroys this base texture
diff --git a/src/pixi/textures/RenderTexture.js b/src/pixi/textures/RenderTexture.js
index 5328f80..cff3713 100644
--- a/src/pixi/textures/RenderTexture.js
+++ b/src/pixi/textures/RenderTexture.js
@@ -51,8 +51,8 @@
 	}
 }
 
-PIXI.RenderTexture.constructor = PIXI.RenderTexture;
 PIXI.RenderTexture.prototype = Object.create( PIXI.Texture.prototype );
+PIXI.RenderTexture.prototype.constructor = PIXI.RenderTexture;
 
 /**
  * Initializes the webgl data for this texture

diff --git a/src/pixi/InteractionManager.js b/src/pixi/InteractionManager.js
index bdbb276..e125dc8 100644
--- a/src/pixi/InteractionManager.js
+++ b/src/pixi/InteractionManager.js
@@ -53,7 +53,7 @@
 }
 
 // constructor
-PIXI.InteractionManager.constructor = PIXI.InteractionManager;
+PIXI.InteractionManager.prototype.constructor = PIXI.InteractionManager;
 
 /**
  * Collects an interactive sprite recursively to have their interactions managed
@@ -618,4 +618,4 @@
 }
 
 // constructor
-PIXI.InteractionData.constructor = PIXI.InteractionData;
+PIXI.InteractionData.prototype.constructor = PIXI.InteractionData;
diff --git a/src/pixi/core/Circle.js b/src/pixi/core/Circle.js
index 6c3433d..a9ceed0 100644
--- a/src/pixi/core/Circle.js
+++ b/src/pixi/core/Circle.js
@@ -69,5 +69,5 @@
     return (dx + dy <= r2);
 }
 
-PIXI.Circle.constructor = PIXI.Circle;
+PIXI.Circle.prototype.constructor = PIXI.Circle;
 
diff --git a/src/pixi/core/Ellipse.js b/src/pixi/core/Ellipse.js
index a0703ad..dd369da 100644
--- a/src/pixi/core/Ellipse.js
+++ b/src/pixi/core/Ellipse.js
@@ -83,5 +83,5 @@
     return new PIXI.Rectangle(this.x, this.y, this.width, this.height);
 }
 
-PIXI.Ellipse.constructor = PIXI.Ellipse;
+PIXI.Ellipse.prototype.constructor = PIXI.Ellipse;
 
diff --git a/src/pixi/core/Point.js b/src/pixi/core/Point.js
index 294a8f8..8520861 100644
--- a/src/pixi/core/Point.js
+++ b/src/pixi/core/Point.js
@@ -39,5 +39,5 @@
 }
 
 // constructor
-PIXI.Point.constructor = PIXI.Point;
+PIXI.Point.prototype.constructor = PIXI.Point;
 
diff --git a/src/pixi/core/Polygon.js b/src/pixi/core/Polygon.js
index 5c1db06..47cf17b 100644
--- a/src/pixi/core/Polygon.js
+++ b/src/pixi/core/Polygon.js
@@ -73,5 +73,5 @@
     return inside;
 }
 
-PIXI.Polygon.constructor = PIXI.Polygon;
+PIXI.Polygon.prototype.constructor = PIXI.Polygon;
 
diff --git a/src/pixi/core/Rectangle.js b/src/pixi/core/Rectangle.js
index 64acf7a..66fb5d6 100644
--- a/src/pixi/core/Rectangle.js
+++ b/src/pixi/core/Rectangle.js
@@ -82,5 +82,5 @@
 }
 
 // constructor
-PIXI.Rectangle.constructor = PIXI.Rectangle;
+PIXI.Rectangle.prototype.constructor = PIXI.Rectangle;
 
diff --git a/src/pixi/display/DisplayObject.js b/src/pixi/display/DisplayObject.js
index 3b51aaf..f8ee024 100644
--- a/src/pixi/display/DisplayObject.js
+++ b/src/pixi/display/DisplayObject.js
@@ -258,7 +258,7 @@
 }
 
 // constructor
-PIXI.DisplayObject.constructor = PIXI.DisplayObject;
+PIXI.DisplayObject.prototype.constructor = PIXI.DisplayObject;
 
 //TODO make visible a getter setter
 /*
diff --git a/src/pixi/display/DisplayObjectContainer.js b/src/pixi/display/DisplayObjectContainer.js
index 4a3a204..649169f 100644
--- a/src/pixi/display/DisplayObjectContainer.js
+++ b/src/pixi/display/DisplayObjectContainer.js
@@ -26,8 +26,8 @@
 }
 
 // constructor
-PIXI.DisplayObjectContainer.constructor = PIXI.DisplayObjectContainer;
 PIXI.DisplayObjectContainer.prototype = Object.create( PIXI.DisplayObject.prototype );
+PIXI.DisplayObjectContainer.prototype.constructor = PIXI.DisplayObjectContainer;
 
 //TODO make visible a getter setter
 /*
diff --git a/src/pixi/display/MovieClip.js b/src/pixi/display/MovieClip.js
index b435ffe..7a77856 100644
--- a/src/pixi/display/MovieClip.js
+++ b/src/pixi/display/MovieClip.js
@@ -69,8 +69,8 @@
 }
 
 // constructor
-PIXI.MovieClip.constructor = PIXI.MovieClip;
 PIXI.MovieClip.prototype = Object.create( PIXI.Sprite.prototype );
+PIXI.MovieClip.prototype.constructor = PIXI.MovieClip;
 
 /**
  * Stops the MovieClip
diff --git a/src/pixi/display/Sprite.js b/src/pixi/display/Sprite.js
index 945331a..0713205 100644
--- a/src/pixi/display/Sprite.js
+++ b/src/pixi/display/Sprite.js
@@ -80,8 +80,8 @@
 }
 
 // constructor
-PIXI.Sprite.constructor = PIXI.Sprite;
 PIXI.Sprite.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Sprite.prototype.constructor = PIXI.Sprite;
 
 /**
  * The width of the sprite, setting this will actually modify the scale to acheive the value set
diff --git a/src/pixi/display/Stage.js b/src/pixi/display/Stage.js
index 447d77a..681c91b 100644
--- a/src/pixi/display/Stage.js
+++ b/src/pixi/display/Stage.js
@@ -65,8 +65,8 @@
 }
 
 // constructor
-PIXI.Stage.constructor = PIXI.Stage;
 PIXI.Stage.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Stage.prototype.constructor = PIXI.Stage;
 
 /*
  * Updates the object transform for rendering
diff --git a/src/pixi/extras/CustomRenderable.js b/src/pixi/extras/CustomRenderable.js
index 7477195..eb0dc5b 100644
--- a/src/pixi/extras/CustomRenderable.js
+++ b/src/pixi/extras/CustomRenderable.js
@@ -17,8 +17,8 @@
 }
 
 // constructor
-PIXI.CustomRenderable.constructor = PIXI.CustomRenderable;
 PIXI.CustomRenderable.prototype = Object.create( PIXI.DisplayObject.prototype );
+PIXI.CustomRenderable.prototype.constructor = PIXI.CustomRenderable;
 
 /**
  * If this object is being rendered by a CanvasRenderer it will call this callback
diff --git a/src/pixi/extras/Rope.js b/src/pixi/extras/Rope.js
index 879fd13..1c057c8 100644
--- a/src/pixi/extras/Rope.js
+++ b/src/pixi/extras/Rope.js
@@ -29,8 +29,8 @@
 
 
 // constructor
-PIXI.Rope.constructor = PIXI.Rope;
 PIXI.Rope.prototype = Object.create( PIXI.Strip.prototype );
+PIXI.Rope.prototype.constructor = PIXI.Rope;
 
 PIXI.Rope.prototype.refresh = function()
 {
diff --git a/src/pixi/extras/Spine.js b/src/pixi/extras/Spine.js
index 006fb6d..5ee161a 100644
--- a/src/pixi/extras/Spine.js
+++ b/src/pixi/extras/Spine.js
@@ -58,8 +58,8 @@
 	};
 }
 
-PIXI.Spine.constructor = PIXI.Spine;
 PIXI.Spine.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Spine.prototype.constructor = PIXI.Spine;
 
 /*
  * Updates the object transform for rendering
diff --git a/src/pixi/extras/Strip.js b/src/pixi/extras/Strip.js
index d2a6937..1e5ba3b 100644
--- a/src/pixi/extras/Strip.js
+++ b/src/pixi/extras/Strip.js
@@ -66,8 +66,8 @@
 }
 
 // constructor
-PIXI.Strip.constructor = PIXI.Strip;
 PIXI.Strip.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Strip.prototype.constructor = PIXI.Strip;
 
 PIXI.Strip.prototype.setTexture = function(texture)
 {
diff --git a/src/pixi/extras/TilingSprite.js b/src/pixi/extras/TilingSprite.js
index 9a49e1c..2cb17fa 100644
--- a/src/pixi/extras/TilingSprite.js
+++ b/src/pixi/extras/TilingSprite.js
@@ -62,8 +62,8 @@
 }
 
 // constructor
-PIXI.TilingSprite.constructor = PIXI.TilingSprite;
 PIXI.TilingSprite.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.TilingSprite.prototype.constructor = PIXI.TilingSprite;
 
 /**
  * Sets the texture of the tiling sprite
diff --git a/src/pixi/loaders/AssetLoader.js b/src/pixi/loaders/AssetLoader.js
index 7936b83..168a5f8 100644
--- a/src/pixi/loaders/AssetLoader.js
+++ b/src/pixi/loaders/AssetLoader.js
@@ -69,7 +69,7 @@
  */
 
 // constructor
-PIXI.AssetLoader.constructor = PIXI.AssetLoader;
+PIXI.AssetLoader.prototype.constructor = PIXI.AssetLoader;
 
 /**
  * Starts loading the assets sequentially
diff --git a/src/pixi/loaders/BitmapFontLoader.js b/src/pixi/loaders/BitmapFontLoader.js
index af08b83..4afd8aa 100644
--- a/src/pixi/loaders/BitmapFontLoader.js
+++ b/src/pixi/loaders/BitmapFontLoader.js
@@ -58,7 +58,7 @@
 };
 
 // constructor
-PIXI.BitmapFontLoader.constructor = PIXI.BitmapFontLoader;
+PIXI.BitmapFontLoader.prototype.constructor = PIXI.BitmapFontLoader;
 
 /**
  * Loads the XML font data
diff --git a/src/pixi/loaders/ImageLoader.js b/src/pixi/loaders/ImageLoader.js
index 942b009..971c012 100644
--- a/src/pixi/loaders/ImageLoader.js
+++ b/src/pixi/loaders/ImageLoader.js
@@ -27,7 +27,7 @@
 };
 
 // constructor
-PIXI.ImageLoader.constructor = PIXI.ImageLoader;
+PIXI.ImageLoader.prototype.constructor = PIXI.ImageLoader;
 
 /**
  * Loads image or takes it from cache
diff --git a/src/pixi/loaders/JsonLoader.js b/src/pixi/loaders/JsonLoader.js
index 1fee06b..1f4ecfe 100644
--- a/src/pixi/loaders/JsonLoader.js
+++ b/src/pixi/loaders/JsonLoader.js
@@ -53,7 +53,7 @@
 };
 
 // constructor
-PIXI.JsonLoader.constructor = PIXI.JsonLoader;
+PIXI.JsonLoader.prototype.constructor = PIXI.JsonLoader;
 
 /**
  * Loads the JSON data
diff --git a/src/pixi/loaders/SpineLoader.js b/src/pixi/loaders/SpineLoader.js
index ce32257..f5e16b0 100644
--- a/src/pixi/loaders/SpineLoader.js
+++ b/src/pixi/loaders/SpineLoader.js
@@ -51,7 +51,7 @@
 	this.loaded = false;
 }
 
-PIXI.SpineLoader.constructor = PIXI.SpineLoader;
+PIXI.SpineLoader.prototype.constructor = PIXI.SpineLoader;
 
 /**
  * Loads the JSON data
diff --git a/src/pixi/loaders/SpriteSheetLoader.js b/src/pixi/loaders/SpriteSheetLoader.js
index 5495f57..169fb70 100644
--- a/src/pixi/loaders/SpriteSheetLoader.js
+++ b/src/pixi/loaders/SpriteSheetLoader.js
@@ -69,7 +69,7 @@
 };
 
 // constructor
-PIXI.SpriteSheetLoader.constructor = PIXI.SpriteSheetLoader;
+PIXI.SpriteSheetLoader.prototype.constructor = PIXI.SpriteSheetLoader;
 
 /**
  * This will begin loading the JSON file
diff --git a/src/pixi/primitives/Graphics.js b/src/pixi/primitives/Graphics.js
index 768fede..7a80553 100644
--- a/src/pixi/primitives/Graphics.js
+++ b/src/pixi/primitives/Graphics.js
@@ -62,8 +62,8 @@
 }
 
 // constructor
-PIXI.Graphics.constructor = PIXI.Graphics;
 PIXI.Graphics.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+PIXI.Graphics.prototype.constructor = PIXI.Graphics;
 
 /**
  * Specifies a line style used for subsequent calls to Graphics methods such as the lineTo() method or the drawCircle() method.
diff --git a/src/pixi/renderers/canvas/CanvasRenderer.js b/src/pixi/renderers/canvas/CanvasRenderer.js
index d1be4b2..060327d 100644
--- a/src/pixi/renderers/canvas/CanvasRenderer.js
+++ b/src/pixi/renderers/canvas/CanvasRenderer.js
@@ -61,7 +61,7 @@
 }
 
 // constructor
-PIXI.CanvasRenderer.constructor = PIXI.CanvasRenderer;
+PIXI.CanvasRenderer.prototype.constructor = PIXI.CanvasRenderer;
 
 /**
  * Renders the stage to its canvas view
diff --git a/src/pixi/renderers/webgl/WebGLBatch.js b/src/pixi/renderers/webgl/WebGLBatch.js
index 1eca2fa..f452d37 100644
--- a/src/pixi/renderers/webgl/WebGLBatch.js
+++ b/src/pixi/renderers/webgl/WebGLBatch.js
@@ -66,7 +66,7 @@
 }
 
 // constructor
-PIXI.WebGLBatch.constructor = PIXI.WebGLBatch;
+PIXI.WebGLBatch.prototype.constructor = PIXI.WebGLBatch;
 
 /**
  * Cleans the batch so that is can be returned to an object pool and reused
diff --git a/src/pixi/renderers/webgl/WebGLRenderGroup.js b/src/pixi/renderers/webgl/WebGLRenderGroup.js
index 277d893..a4ad4e9 100644
--- a/src/pixi/renderers/webgl/WebGLRenderGroup.js
+++ b/src/pixi/renderers/webgl/WebGLRenderGroup.js
@@ -26,7 +26,7 @@
 }
 
 // constructor
-PIXI.WebGLRenderGroup.constructor = PIXI.WebGLRenderGroup;
+PIXI.WebGLRenderGroup.prototype.constructor = PIXI.WebGLRenderGroup;
 
 /**
  * Add a display object to the webgl renderer
diff --git a/src/pixi/renderers/webgl/WebGLRenderer.js b/src/pixi/renderers/webgl/WebGLRenderer.js
index 5ea5adc..2ecb971 100644
--- a/src/pixi/renderers/webgl/WebGLRenderer.js
+++ b/src/pixi/renderers/webgl/WebGLRenderer.js
@@ -81,7 +81,7 @@
 }
 
 // constructor
-PIXI.WebGLRenderer.constructor = PIXI.WebGLRenderer;
+PIXI.WebGLRenderer.prototype.constructor = PIXI.WebGLRenderer;
 
 /**
  * Gets a new WebGLBatch from the pool
diff --git a/src/pixi/text/BitmapText.js b/src/pixi/text/BitmapText.js
index d982d1d..b667172 100644
--- a/src/pixi/text/BitmapText.js
+++ b/src/pixi/text/BitmapText.js
@@ -28,8 +28,8 @@
 };
 
 // constructor
-PIXI.BitmapText.constructor = PIXI.BitmapText;
 PIXI.BitmapText.prototype = Object.create(PIXI.DisplayObjectContainer.prototype);
+PIXI.BitmapText.prototype.constructor = PIXI.BitmapText;
 
 /**
  * Set the copy for the text object
diff --git a/src/pixi/text/Text.js b/src/pixi/text/Text.js
index 0b62bc7..4a3d89f 100644
--- a/src/pixi/text/Text.js
+++ b/src/pixi/text/Text.js
@@ -32,8 +32,8 @@
 };
 
 // constructor
-PIXI.Text.constructor = PIXI.Text;
 PIXI.Text.prototype = Object.create(PIXI.Sprite.prototype);
+PIXI.Text.prototype.constructor = PIXI.Text;
 
 /**
  * Set the style of the text
diff --git a/src/pixi/textures/BaseTexture.js b/src/pixi/textures/BaseTexture.js
index 25ff347..4b7e7ac 100644
--- a/src/pixi/textures/BaseTexture.js
+++ b/src/pixi/textures/BaseTexture.js
@@ -94,7 +94,7 @@
 	this._powerOf2 = false;
 }
 
-PIXI.BaseTexture.constructor = PIXI.BaseTexture;
+PIXI.BaseTexture.prototype.constructor = PIXI.BaseTexture;
 
 /**
  * Destroys this base texture
diff --git a/src/pixi/textures/RenderTexture.js b/src/pixi/textures/RenderTexture.js
index 5328f80..cff3713 100644
--- a/src/pixi/textures/RenderTexture.js
+++ b/src/pixi/textures/RenderTexture.js
@@ -51,8 +51,8 @@
 	}
 }
 
-PIXI.RenderTexture.constructor = PIXI.RenderTexture;
 PIXI.RenderTexture.prototype = Object.create( PIXI.Texture.prototype );
+PIXI.RenderTexture.prototype.constructor = PIXI.RenderTexture;
 
 /**
  * Initializes the webgl data for this texture
diff --git a/src/pixi/textures/Texture.js b/src/pixi/textures/Texture.js
index 748f996..419c7b2 100644
--- a/src/pixi/textures/Texture.js
+++ b/src/pixi/textures/Texture.js
@@ -68,7 +68,7 @@
 	}
 }
 
-PIXI.Texture.constructor = PIXI.Texture;
+PIXI.Texture.prototype.constructor = PIXI.Texture;
 
 /**
  * Called when the base texture is loaded