--- a/dom/media/MediaDecoderStateMachine.cpp
+++ b/dom/media/MediaDecoderStateMachine.cpp
@@ -2232,22 +2232,20 @@ BufferingState::Step()
       SLOG("Buffering: wait %ds, timeout in %.3lfs",
            mBufferingWait, mBufferingWait - elapsed.ToSeconds());
       mMaster->ScheduleStateMachineIn(USECS_PER_S);
       mMaster->DispatchDecodeTasksIfNeeded();
       return;
     }
   } else if (mMaster->OutOfDecodedAudio() || mMaster->OutOfDecodedVideo()) {
     mMaster->DispatchDecodeTasksIfNeeded();
-    MOZ_ASSERT(mMaster->mMinimizePreroll ||
-               !mMaster->OutOfDecodedAudio() ||
+    MOZ_ASSERT(!mMaster->OutOfDecodedAudio() ||
                mMaster->IsRequestingAudioData() ||
                mMaster->IsWaitingAudioData());
-    MOZ_ASSERT(mMaster->mMinimizePreroll ||
-               !mMaster->OutOfDecodedVideo() ||
+    MOZ_ASSERT(!mMaster->OutOfDecodedVideo() ||
                mMaster->IsRequestingVideoData() ||
                mMaster->IsWaitingVideoData());
     SLOG("In buffering mode, waiting to be notified: outOfAudio: %d, "
          "mAudioStatus: %s, outOfVideo: %d, mVideoStatus: %s",
          mMaster->OutOfDecodedAudio(), mMaster->AudioRequestStatus(),
          mMaster->OutOfDecodedVideo(), mMaster->VideoRequestStatus());
     return;
   }