diff --git a/include/media/AudioSystem.h b/include/media/AudioSystem.h
index 225ef76..4c22412 100644
--- a/include/media/AudioSystem.h
+++ b/include/media/AudioSystem.h
@@ -127,8 +127,8 @@
     // NOTE: this feature is not supported on all hardware platforms and it is
     // necessary to check returned status before using the returned values.
     static status_t getRenderPosition(audio_io_handle_t output,
-                                      size_t *halFrames,
-                                      size_t *dspFrames,
+                                      uint32_t *halFrames,
+                                      uint32_t *dspFrames,
                                       audio_stream_type_t stream = AUDIO_STREAM_DEFAULT);
 
     // return the number of input frames lost by HAL implementation, or 0 if the handle is invalid
diff --git a/include/media/IAudioFlinger.h b/include/media/IAudioFlinger.h
index 899d79f..282f275 100644
--- a/include/media/IAudioFlinger.h
+++ b/include/media/IAudioFlinger.h
@@ -167,10 +167,10 @@
 
     virtual status_t setVoiceVolume(float volume) = 0;
 
-    virtual status_t getRenderPosition(size_t *halFrames, size_t *dspFrames,
+    virtual status_t getRenderPosition(uint32_t *halFrames, uint32_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;