diff --git a/media/libmediaplayerservice/MediaPlayerService.cpp b/media/libmediaplayerservice/MediaPlayerService.cpp
index 6332f70..594e010 100644
--- a/media/libmediaplayerservice/MediaPlayerService.cpp
+++ b/media/libmediaplayerservice/MediaPlayerService.cpp
@@ -1805,7 +1805,7 @@
     }
 
     // wake up thread
-    Mutex::Autolock lock(mLock);
+    Mutex::Autolock lock(p->mLock);
     p->mCommandComplete = true;
     p->mSignal.signal();
 }