diff --git a/include/media/MediaPlayerInterface.h b/include/media/MediaPlayerInterface.h
index 4e18f1f..b3e53fc 100644
--- a/include/media/MediaPlayerInterface.h
+++ b/include/media/MediaPlayerInterface.h
@@ -145,6 +145,11 @@
 
         virtual status_t    setParameters(const String8& /* keyValuePairs */) { return NO_ERROR; }
         virtual String8     getParameters(const String8& /* keys */) { return String8::empty(); }
+
+        virtual VolumeShaper::Status applyVolumeShaper(
+                                    const sp<VolumeShaper::Configuration>& configuration,
+                                    const sp<VolumeShaper::Operation>& operation);
+        virtual sp<VolumeShaper::State> getVolumeShaperState(int id);
     };
 
                         MediaPlayerBase() : mCookie(0), mNotify(0) {}