diff --git a/include/media/AudioTrack.h b/include/media/AudioTrack.h
index d1a8105..f71965e 100644
--- a/include/media/AudioTrack.h
+++ b/include/media/AudioTrack.h
@@ -487,6 +487,8 @@
     int                     mAuxEffectId;
     Mutex                   mLock;
     status_t                mRestoreStatus;
+    int                     mPreviousPriority;          // before start()
+    int                     mPreviousSchedulingGroup;
 };