--- a/dom/media/MediaDecoderStateMachine.cpp
+++ b/dom/media/MediaDecoderStateMachine.cpp
@@ -830,17 +830,16 @@ MediaDecoderStateMachine::CheckIfDecodeC
   MOZ_ASSERT(OnTaskQueue());
   MOZ_ASSERT(mState == DECODER_STATE_DECODING ||
              mState == DECODER_STATE_BUFFERING);
 
   if (!IsVideoDecoding() && !IsAudioDecoding()) {
     // We've finished decoding all active streams,
     // so move to COMPLETED state.
     SetState(DECODER_STATE_COMPLETED);
-    DispatchDecodeTasksIfNeeded();
     ScheduleStateMachine();
   }
   DECODER_LOG("CheckIfDecodeComplete %scompleted",
               ((mState == DECODER_STATE_COMPLETED) ? "" : "NOT "));
 }
 
 bool MediaDecoderStateMachine::IsPlaying() const
 {