diff --git a/src/pixi/renderers/webgl/utils/WebGLShaderManager.js b/src/pixi/renderers/webgl/utils/WebGLShaderManager.js
index 3d7aa35..8c70bf3 100644
--- a/src/pixi/renderers/webgl/utils/WebGLShaderManager.js
+++ b/src/pixi/renderers/webgl/utils/WebGLShaderManager.js
@@ -14,7 +14,6 @@
     this.maxAttibs = 10;
     this.attribState = [];
     this.tempAttribState = [];
-    this.shaderMap = [];
 
     for (var i = 0; i < this.maxAttibs; i++) {
         this.attribState[i] = false;