diff --git a/services/audioflinger/PlaybackTracks.h b/services/audioflinger/PlaybackTracks.h
index 89ee5c0..1e1b6d2 100644
--- a/services/audioflinger/PlaybackTracks.h
+++ b/services/audioflinger/PlaybackTracks.h
@@ -220,6 +220,8 @@
      */
     void processMuteEvent_l(const sp<IAudioManager>& audioManager, mute_state_t muteState) final;
 
+    bool getInternalMute() const final { return mInternalMute; }
+    void setInternalMute(bool muted) final { mInternalMute = muted; }
 protected:
 
     DISALLOW_COPY_AND_ASSIGN(Track);
@@ -401,6 +403,8 @@
     // access these two variables only when holding player thread lock.
     std::unique_ptr<os::PersistableBundle> mMuteEventExtras;
     mute_state_t        mMuteState;
+
+    bool                mInternalMute = false;
 };  // end of Track