diff --git a/src/core/math/shapes/Rectangle.js b/src/core/math/shapes/Rectangle.js
index 3dd1156..128a7b7 100644
--- a/src/core/math/shapes/Rectangle.js
+++ b/src/core/math/shapes/Rectangle.js
@@ -69,7 +69,7 @@
 Rectangle.prototype.copy = function (rectangle)
 {
     this.x = rectangle.x;
-    this.x = rectangle.y;
+    this.y = rectangle.y;
     this.width = rectangle.width;
     this.height = rectangle.height;