--- a/dom/animation/ScrollTimeline.h
+++ b/dom/animation/ScrollTimeline.h
@@ -96,17 +96,17 @@ public:
 
   void RemoveAnimation(Animation* aAnimation) override;
 
   void Tick();
   void QueryScrollValues();
 
   const ScrollTimeline* AsScrollTimeline() const override { return this; }
 
-  bool SupportsOMTA() const override { return false; }
+  bool SupportsOMTA() const override { return true; }
 
   ScrollDirection GetOrientation() const { return mOrientation; }
   Element* GetScrollableElement() const { return mElement.get(); }
   const StickyTimeDuration& GetTimeRange() const { return mTimeRange; }
 
 protected:
   nsIScrollableFrame* GetScrollFrame() const;
   void CalculateTimeRange();