diff --git a/services/audioflinger/Tracks.cpp b/services/audioflinger/Tracks.cpp
index 31246ec..75d885d 100644
--- a/services/audioflinger/Tracks.cpp
+++ b/services/audioflinger/Tracks.cpp
@@ -113,8 +113,7 @@
         mChannelCount(isOut ?
                 audio_channel_count_from_out_mask(channelMask) :
                 audio_channel_count_from_in_mask(channelMask)),
-        mFrameSize(audio_has_proportional_frames(format) ?
-                mChannelCount * audio_bytes_per_sample(format) : sizeof(int8_t)),
+        mFrameSize(audio_bytes_per_frame(mChannelCount, format)),
         mFrameCount(frameCount),
         mSessionId(sessionId),
         mIsOut(isOut),