diff --git a/include/media/AudioSystem.h b/include/media/AudioSystem.h
index 42bb4df..d0ccc50 100644
--- a/include/media/AudioSystem.h
+++ b/include/media/AudioSystem.h
@@ -233,6 +233,7 @@
     // necessary to check returned status before using the returned values.
     static status_t getRenderPosition(uint32_t *halFrames, uint32_t *dspFrames, int stream = DEFAULT);
 
+    static unsigned int  getInputFramesLost(audio_io_handle_t ioHandle);
     //
     // AudioPolicyService interface
     //