diff --git a/tv/tuner/1.0/vts/functional/DvrTests.cpp b/tv/tuner/1.0/vts/functional/DvrTests.cpp
index ba21189..599abfb 100644
--- a/tv/tuner/1.0/vts/functional/DvrTests.cpp
+++ b/tv/tuner/1.0/vts/functional/DvrTests.cpp
@@ -204,6 +204,7 @@
 void DvrCallback::stopRecordThread() {
     mKeepReadingRecordFMQ = false;
     mRecordThreadRunning = false;
+    android::Mutex::Autolock autoLock(mRecordThreadLock);
 }
 
 AssertionResult DvrTests::openDvrInDemux(DvrType type, uint32_t bufferSize) {