--- a/dom/media/NextFrameSeekTask.cpp
+++ b/dom/media/NextFrameSeekTask.cpp
@@ -217,25 +217,21 @@ NextFrameSeekTask::RequestVideoData()
   AssertOwnerThread();
   SAMPLE_LOG("Queueing video task - queued=%i, decoder-queued=%o",
              !!mSeekedVideoData, mReader->SizeOfVideoQueueInFrames());
 
   mReader->RequestVideoData(false, media::TimeUnit());
 }
 
 bool
-NextFrameSeekTask::IsAudioSeekComplete()
+NextFrameSeekTask::IsAudioSeekComplete() const
 {
   AssertOwnerThread();
-  SAMPLE_LOG("IsAudioSeekComplete() curTarVal=%d aqFin=%d aqSz=%d req=%d wait=%d",
-    mSeekJob.Exists(), mIsAudioQueueFinished, !!mSeekedAudioData,
-    mReader->IsRequestingAudioData(), mReader->IsWaitingAudioData());
-
-  // Just make sure that we are not requesting or waiting for audio data. We
-  // don't really need to get an decoded audio data or get EOS here.
+  // Don't finish seek until there are no pending requests. Otherwise, we might
+  // lose audio samples for the promise is resolved asynchronously.
   return !mReader->IsRequestingAudioData() && !mReader->IsWaitingAudioData();
 }
 
 bool
 NextFrameSeekTask::IsVideoSeekComplete()
 {
   AssertOwnerThread();
   SAMPLE_LOG("IsVideoSeekComplete() curTarVal=%d vqFin=%d vqSz=%d",

--- a/dom/media/NextFrameSeekTask.h
+++ b/dom/media/NextFrameSeekTask.h
@@ -46,17 +46,17 @@ private:
   bool IsVideoDecoding() const;
 
   void EnsureVideoDecodeTaskQueued();
 
   const char* VideoRequestStatus();
 
   void RequestVideoData();
 
-  bool IsAudioSeekComplete();
+  bool IsAudioSeekComplete() const;
 
   bool IsVideoSeekComplete();
 
   void CheckIfSeekComplete();
 
   void OnAudioDecoded(MediaData* aAudioSample);
 
   void OnAudioNotDecoded(MediaDecoderReader::NotDecodedReason aReason);