diff --git a/dom/media/mediaelement/HTMLMediaElement.cpp b/dom/media/mediaelement/HTMLMediaElement.cpp
index 23a897cae83..d137ce24a27 100644
--- a/dom/media/mediaelement/HTMLMediaElement.cpp
+++ b/dom/media/mediaelement/HTMLMediaElement.cpp
@@ -2289,6 +2289,7 @@ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(HTMLMediaElement,
   NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mIncomingMediaKeys)
   NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mSelectedVideoStreamTrack)
   NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mPendingPlayPromises)
+  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mPendingPlayPromisesRunners)
   NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mSeekDOMPromise)
   NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mSetMediaKeysDOMPromise)
   NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mEventBlocker)
@@ -2343,6 +2344,7 @@ NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(HTMLMediaElement,
   NS_IMPL_CYCLE_COLLECTION_UNLINK(mIncomingMediaKeys)
   NS_IMPL_CYCLE_COLLECTION_UNLINK(mSelectedVideoStreamTrack)
   NS_IMPL_CYCLE_COLLECTION_UNLINK(mPendingPlayPromises)
+  NS_IMPL_CYCLE_COLLECTION_UNLINK(mPendingPlayPromisesRunners)
   NS_IMPL_CYCLE_COLLECTION_UNLINK(mSeekDOMPromise)
   NS_IMPL_CYCLE_COLLECTION_UNLINK(mSetMediaKeysDOMPromise)
   if (tmp->mMediaControlKeyListener) {
diff --git a/dom/media/mediaelement/HTMLMediaElement.h b/dom/media/mediaelement/HTMLMediaElement.h
index 461ac486b04..5e475108046 100644
--- a/dom/media/mediaelement/HTMLMediaElement.h
+++ b/dom/media/mediaelement/HTMLMediaElement.h
@@ -1972,7 +1972,7 @@ class HTMLMediaElement : public nsGenericHTMLElement,
   // Runners whose Run() method is called remove themselves from this list.
   // We keep track of these because the load algorithm resolves/rejects all
   // already-dispatched pending play promises.
-  nsTArray<nsResolveOrRejectPendingPlayPromisesRunner*>
+  nsTArray<RefPtr<nsResolveOrRejectPendingPlayPromisesRunner>>
       mPendingPlayPromisesRunners;
 
   // A pending seek promise which is created at Seek() method call and is