diff --git a/include/media/mediaplayer.h b/include/media/mediaplayer.h
index e756368..2442219 100644
--- a/include/media/mediaplayer.h
+++ b/include/media/mediaplayer.h
@@ -172,7 +172,8 @@
     INVOKE_ID_ADD_EXTERNAL_SOURCE_FD = 3,
     INVOKE_ID_SELECT_TRACK = 4,
     INVOKE_ID_UNSELECT_TRACK = 5,
-    INVOKE_ID_SET_VIDEO_SCALING_MODE = 6
+    INVOKE_ID_SET_VIDEO_SCALING_MODE = 6,
+    INVOKE_ID_GET_SELECTED_TRACK = 7
 };
 
 // Keep MEDIA_TRACK_TYPE_* in sync with MediaPlayer.java.