diff --git a/layout/style/nsAnimationManager.h b/layout/style/nsAnimationManager.h
index 7a70683725dd..18769f26ce89 100644
--- a/layout/style/nsAnimationManager.h
+++ b/layout/style/nsAnimationManager.h
@@ -313,7 +313,11 @@ public:
    * accumulate animationstart events at other points when style
    * contexts are created.
    */
-  void DispatchEvents()  { mEventDispatcher.DispatchEvents(mPresContext); }
+  void DispatchEvents()
+  {
+    RefPtr<nsAnimationManager> kungFuDeathGrip(this);
+    mEventDispatcher.DispatchEvents(mPresContext);
+  }
   void SortEvents()      { mEventDispatcher.SortEvents(); }
   void ClearEventQueue() { mEventDispatcher.ClearEventQueue(); }
 
diff --git a/layout/style/nsTransitionManager.h b/layout/style/nsTransitionManager.h
index 65a68771c260..35c627af82b2 100644
--- a/layout/style/nsTransitionManager.h
+++ b/layout/style/nsTransitionManager.h
@@ -306,7 +306,11 @@ public:
       mozilla::Forward<mozilla::TransitionEventInfo>(aEventInfo));
   }
 
-  void DispatchEvents()  { mEventDispatcher.DispatchEvents(mPresContext); }
+  void DispatchEvents()
+  {
+    RefPtr<nsTransitionManager> kungFuDeathGrip(this);
+    mEventDispatcher.DispatchEvents(mPresContext);
+  }
   void SortEvents()      { mEventDispatcher.SortEvents(); }
   void ClearEventQueue() { mEventDispatcher.ClearEventQueue(); }