diff --git a/include/media/MediaTrack.h b/include/media/MediaTrack.h
index e828a7f..493eba3 100644
--- a/include/media/MediaTrack.h
+++ b/include/media/MediaTrack.h
@@ -142,7 +142,7 @@
 
 class MediaTrackCUnwrapper : public MediaTrack {
 public:
-    explicit MediaTrackCUnwrapper(CMediaTrack *wrapper);
+    static MediaTrackCUnwrapper *create(CMediaTrack *wrapper);
 
     virtual status_t start();
     virtual status_t stop();
@@ -155,6 +155,7 @@
     virtual ~MediaTrackCUnwrapper();
 
 private:
+    explicit MediaTrackCUnwrapper(CMediaTrack *wrapper);
     CMediaTrack *wrapper;
     MediaBufferGroup *bufferGroup;
 };