diff --git a/src/core/display/Transform.js b/src/core/display/Transform.js
index 183fa0b..0adae1b 100644
--- a/src/core/display/Transform.js
+++ b/src/core/display/Transform.js
@@ -67,10 +67,10 @@
      */
     updateSkew()
     {
-        this._cx = Math.cos(this.rotation + this.skew._y);
-        this._sx = Math.sin(this.rotation + this.skew._y);
-        this._cy = -Math.sin(this.rotation - this.skew._x); // cos, added PI/2
-        this._sy = Math.cos(this.rotation - this.skew._x); // sin, added PI/2
+        this._cx = Math.cos(this._rotation + this.skew._y);
+        this._sx = Math.sin(this._rotation + this.skew._y);
+        this._cy = -Math.sin(this._rotation - this.skew._x); // cos, added PI/2
+        this._sy = Math.cos(this._rotation - this.skew._x); // sin, added PI/2
     }
 
     /**

diff --git a/src/core/display/Transform.js b/src/core/display/Transform.js
index 183fa0b..0adae1b 100644
--- a/src/core/display/Transform.js
+++ b/src/core/display/Transform.js
@@ -67,10 +67,10 @@
      */
     updateSkew()
     {
-        this._cx = Math.cos(this.rotation + this.skew._y);
-        this._sx = Math.sin(this.rotation + this.skew._y);
-        this._cy = -Math.sin(this.rotation - this.skew._x); // cos, added PI/2
-        this._sy = Math.cos(this.rotation - this.skew._x); // sin, added PI/2
+        this._cx = Math.cos(this._rotation + this.skew._y);
+        this._sx = Math.sin(this._rotation + this.skew._y);
+        this._cy = -Math.sin(this._rotation - this.skew._x); // cos, added PI/2
+        this._sy = Math.cos(this._rotation - this.skew._x); // sin, added PI/2
     }
 
     /**
diff --git a/src/core/display/TransformStatic.js b/src/core/display/TransformStatic.js
index e763127..ee0a843 100644
--- a/src/core/display/TransformStatic.js
+++ b/src/core/display/TransformStatic.js
@@ -73,10 +73,10 @@
      */
     updateSkew()
     {
-        this._cx = Math.cos(this.rotation + this.skew._y);
-        this._sx = Math.sin(this.rotation + this.skew._y);
-        this._cy = -Math.sin(this.rotation - this.skew._x); // cos, added PI/2
-        this._sy = Math.cos(this.rotation - this.skew._x); // sin, added PI/2
+        this._cx = Math.cos(this._rotation + this.skew._y);
+        this._sx = Math.sin(this._rotation + this.skew._y);
+        this._cy = -Math.sin(this._rotation - this.skew._x); // cos, added PI/2
+        this._sy = Math.cos(this._rotation - this.skew._x); // sin, added PI/2
 
         this._localID ++;
     }