--- a/dom/animation/Animation.h
+++ b/dom/animation/Animation.h
@@ -64,17 +64,17 @@ public:
     , mFinishedIsResolved(false)
   {
   }
 
   NS_DECL_ISUPPORTS_INHERITED
   NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(Animation,
                                            DOMEventTargetHelper)
 
-  AnimationTimeline* GetParentObject() const { return mTimeline; }
+  nsIGlobalObject* GetParentObject() const { return GetOwnerGlobal(); }
   virtual JSObject* WrapObject(JSContext* aCx,
                                JS::Handle<JSObject*> aGivenProto) override;
 
   virtual CSSAnimation* AsCSSAnimation() { return nullptr; }
   virtual const CSSAnimation* AsCSSAnimation() const { return nullptr; }
   virtual CSSTransition* AsCSSTransition() { return nullptr; }
   virtual const CSSTransition* AsCSSTransition() const { return nullptr; }