diff --git a/content/media/DOMMediaStream.cpp b/content/media/DOMMediaStream.cpp
index 2c645eb919a..dff6dd1c96c 100644
--- a/content/media/DOMMediaStream.cpp
+++ b/content/media/DOMMediaStream.cpp
@@ -97,7 +97,7 @@ public:
                                         TrackRate aTrackRate,
                                         TrackTicks aTrackOffset,
                                         uint32_t aTrackEvents,
-                                        const MediaSegment& aQueuedMedia)
+                                        const MediaSegment& aQueuedMedia) MOZ_OVERRIDE
   {
     if (aTrackEvents & (TRACK_EVENT_CREATED | TRACK_EVENT_ENDED)) {
       nsRefPtr<TrackChange> runnable =
diff --git a/content/media/webspeech/recognition/SpeechStreamListener.h b/content/media/webspeech/recognition/SpeechStreamListener.h
index 428d9d24e89..8966615a5d0 100644
--- a/content/media/webspeech/recognition/SpeechStreamListener.h
+++ b/content/media/webspeech/recognition/SpeechStreamListener.h
@@ -27,9 +27,9 @@ public:
                                 TrackRate aTrackRate,
                                 TrackTicks aTrackOffset,
                                 uint32_t aTrackEvents,
-                                const MediaSegment& aQueuedMedia);
+                                const MediaSegment& aQueuedMedia) MOZ_OVERRIDE;
 
-  void NotifyFinished(MediaStreamGraph* aGraph);
+  void NotifyFinished(MediaStreamGraph* aGraph) MOZ_OVERRIDE;
 
 private:
   template<typename SampleFormatType> void ConvertAndDispatchAudioChunk(AudioChunk& aChunk);