diff --git a/services/audioflinger/MmapTracks.h b/services/audioflinger/MmapTracks.h
index 30bbd5d..0210bc2 100644
--- a/services/audioflinger/MmapTracks.h
+++ b/services/audioflinger/MmapTracks.h
@@ -73,10 +73,10 @@
         mVolume = volume;
     }
     void setPortMute(bool muted) override {
-        mMuteState.muteFromPortVolume = muted;
+        mMutedFromPort = muted;
     }
     float getPortVolume() const override { return mVolume; }
-    bool getPortMute() const override { return mMuteState.muteFromPortVolume; }
+    bool getPortMute() const override { return mMutedFromPort; }
 
 private:
     DISALLOW_COPY_AND_ASSIGN(MmapTrack);
@@ -101,6 +101,7 @@
             /* GUARDED_BY(MmapPlaybackThread::mLock) */;
     mute_state_t mMuteState
             /* GUARDED_BY(MmapPlaybackThread::mLock) */;
+    bool mMutedFromPort;
 
     float mVolume = 0.0f;
 };  // end of Track