diff --git a/include/media/IAudioFlinger.h b/include/media/IAudioFlinger.h
index 899d79f..c9cffe3 100644
--- a/include/media/IAudioFlinger.h
+++ b/include/media/IAudioFlinger.h
@@ -170,7 +170,7 @@
     virtual status_t getRenderPosition(size_t *halFrames, size_t *dspFrames,
                                     audio_io_handle_t output) const = 0;
 
-    virtual size_t getInputFramesLost(audio_io_handle_t ioHandle) const = 0;
+    virtual uint32_t getInputFramesLost(audio_io_handle_t ioHandle) const = 0;
 
     virtual int newAudioSessionId() = 0;