diff --git a/src/core/graphics/GraphicsData.js b/src/core/graphics/GraphicsData.js
index a64fadc..0e79fbb 100644
--- a/src/core/graphics/GraphicsData.js
+++ b/src/core/graphics/GraphicsData.js
@@ -84,5 +84,5 @@
 };
 
 GraphicsData.prototype.destroy = function () {
-    ths.shape = null;
+    this.shape = null;
 };