--- a/dom/media/mediasink/DecodedStream.cpp
+++ b/dom/media/mediasink/DecodedStream.cpp
@@ -724,20 +724,21 @@ DecodedStream::GetPosition(TimeStamp* aT
   return mStartTime.ref() + mLastOutputTime;
 }
 
 void
 DecodedStream::NotifyOutput(int64_t aTime)
 {
   AssertOwnerThread();
   mLastOutputTime = aTime;
+  int64_t currentTime = GetPosition();
 
   // Remove audio samples that have been played by MSG from the queue.
   RefPtr<MediaData> a = mAudioQueue.PeekFront();
-  for (; a && a->mTime < aTime;) {
+  for (; a && a->mTime < currentTime;) {
     RefPtr<MediaData> releaseMe = mAudioQueue.PopFront();
     a = mAudioQueue.PeekFront();
   }
 }
 
 void
 DecodedStream::ConnectListener()
 {