diff --git a/gnss/2.1/default/GnssAntennaInfo.cpp b/gnss/2.1/default/GnssAntennaInfo.cpp
index d32a0af..ed183a9 100644
--- a/gnss/2.1/default/GnssAntennaInfo.cpp
+++ b/gnss/2.1/default/GnssAntennaInfo.cpp
@@ -55,8 +55,8 @@
 
 Return<void> GnssAntennaInfo::close() {
     ALOGD("close");
-    std::unique_lock<std::mutex> lock(mMutex);
     stop();
+    std::unique_lock<std::mutex> lock(mMutex);
     sCallback = nullptr;
     return Void();
 }