diff --git a/content/canvas/src/WebGLContextNotSupported.cpp b/content/canvas/src/WebGLContextNotSupported.cpp
index c9bee8d7ef27..fa3dd998b62a 100644
--- a/content/canvas/src/WebGLContextNotSupported.cpp
+++ b/content/canvas/src/WebGLContextNotSupported.cpp
@@ -38,6 +38,7 @@
 
 #include "nsICanvasRenderingContextWebGL.h"
 #include "WebGLArray.h"
+#include "nsDOMClassInfoID.h"
 
 #define DUMMY(func,rtype)  nsresult func (rtype ** aResult) { return NS_ERROR_FAILURE; }
 
@@ -50,3 +51,11 @@ DUMMY(NS_NewWebGLUnsignedShortArray, nsISupports)
 DUMMY(NS_NewWebGLIntArray, nsISupports)
 DUMMY(NS_NewWebGLUnsignedIntArray, nsISupports)
 DUMMY(NS_NewWebGLArrayBuffer, nsISupports)
+
+DOMCI_DATA(CanvasRenderingContextWebGL, void)
+DOMCI_DATA(WebGLBuffer, void)
+DOMCI_DATA(WebGLTexture, void)
+DOMCI_DATA(WebGLProgram, void)
+DOMCI_DATA(WebGLShader, void)
+DOMCI_DATA(WebGLFramebuffer, void)
+DOMCI_DATA(WebGLRenderbuffer, void)