--- a/dom/canvas/WebGLContext.h
+++ b/dom/canvas/WebGLContext.h
@@ -1594,17 +1594,17 @@ ToSupports(WebGLContext* webgl)
  ** Template implementations
  **/
 
 template<class ObjectType>
 inline bool
 WebGLContext::ValidateObjectAllowDeletedOrNull(const char* info,
                                                ObjectType* object)
 {
-    if (object && !object->IsCompatibleWithContext(this)) {
+    if (object && !object->Context()) {
         ErrorInvalidOperation("%s: object from different WebGL context "
                               "(or older generation of this one) "
                               "passed as argument", info);
         return false;
     }
 
     return true;
 }