diff --git a/media/libmediaplayerservice/MediaPlayerService.h b/media/libmediaplayerservice/MediaPlayerService.h
index 1c90cf9..d1206b4 100644
--- a/media/libmediaplayerservice/MediaPlayerService.h
+++ b/media/libmediaplayerservice/MediaPlayerService.h
@@ -113,6 +113,7 @@
 
         public: // visualization hack support
         uint32_t                mNumFramesWritten;
+        void                    snoopWrite(const void*, size_t);
     };
 
     class AudioCache : public MediaPlayerBase::AudioSink