diff --git a/media/libaudioclient/AudioTrack.cpp b/media/libaudioclient/AudioTrack.cpp
index 5e2dfcc..9617556 100644
--- a/media/libaudioclient/AudioTrack.cpp
+++ b/media/libaudioclient/AudioTrack.cpp
@@ -2689,7 +2689,7 @@
             // written in the next write() call, since it's not passed through the callback
             audioBuffer.size += nonContig;
         }
-        size_t writtenSize = (mTransfer == TRANSFER_CALLBACK)
+        const size_t writtenSize = (mTransfer == TRANSFER_CALLBACK)
                                       ? callback->onMoreData(audioBuffer)
                                       : callback->onCanWriteMoreData(audioBuffer);
         // Validate on returned size
@@ -2751,6 +2751,9 @@
             return ns;
         }
 
+        // releaseBuffer reads from audioBuffer.size
+        audioBuffer.size = writtenSize;
+
         size_t releasedFrames = writtenSize / mFrameSize;
         audioBuffer.frameCount = releasedFrames;
         mRemainingFrames -= releasedFrames;