diff --git a/media/libnbaio/MonoPipeReader.cpp b/media/libnbaio/MonoPipeReader.cpp
index 394f6ac..851341a 100644
--- a/media/libnbaio/MonoPipeReader.cpp
+++ b/media/libnbaio/MonoPipeReader.cpp
@@ -86,4 +86,9 @@
     return red;
 }
 
+void MonoPipeReader::onTimestamp(const AudioTimestamp& timestamp)
+{
+    mPipe->mTimestampMutator.push(timestamp);
+}
+
 }   // namespace android