diff --git a/services/audioflinger/MmapTracks.h b/services/audioflinger/MmapTracks.h
index e4fe8ac..2a27dfd 100644
--- a/services/audioflinger/MmapTracks.h
+++ b/services/audioflinger/MmapTracks.h
@@ -41,11 +41,10 @@
      static void        appendDumpHeader(String8& result);
             void        dump(char* buffer, size_t size);
 
-protected:
+private:
     friend class MmapThread;
 
-                MmapTrack(const MmapTrack&);
-                MmapTrack& operator = (const MmapTrack&);
+    DISALLOW_COPY_AND_ASSIGN(MmapTrack);
 
     // AudioBufferProvider interface
     virtual status_t getNextBuffer(AudioBufferProvider::Buffer* buffer);