diff --git a/services/audioflinger/TrackBase.h b/services/audioflinger/TrackBase.h
index 8f720b5..65589e2 100644
--- a/services/audioflinger/TrackBase.h
+++ b/services/audioflinger/TrackBase.h
@@ -215,6 +215,8 @@
 
     uint32_t channelCount() const { return mChannelCount; }
 
+    size_t frameSize() const { return mFrameSize; }
+
     audio_channel_mask_t channelMask() const { return mChannelMask; }
 
     virtual uint32_t sampleRate() const { return mSampleRate; }