diff --git a/hdf_service/distributed_audio/mfc_test/distributedaudiotest.cpp b/hdf_service/distributed_audio/mfc_test/distributedaudiotest.cpp
index de2c73065f999024665ba945a8310ecc0a7b93d0..e0b756aee6b43011fd7c578d95762fc54f20d292 100644
--- a/hdf_service/distributed_audio/mfc_test/distributedaudiotest.cpp
+++ b/hdf_service/distributed_audio/mfc_test/distributedaudiotest.cpp
@@ -65,8 +65,8 @@ std::vector<uint8_t*> renderData;
 static DeviceStatus g_spkStatus = DEVICE_IDLE;
 static DeviceStatus g_micStatus = DEVICE_IDLE;
 
-std::thread g_palyingThread;
-std::thread g_capingThread;
+static std::thread g_palyingThread;
+static std::thread g_capingThread;
 FILE *g_micFile = nullptr;
 
 static std::string CloseSpk();