diff --git a/hdf_service/distributed_audio/mfc_test/distributedaudiotest.cpp b/hdf_service/distributed_audio/mfc_test/distributedaudiotest.cpp
index de2c73065f999024665ba945a8310ecc0a7b93d0..aa56cc45587538b3de573d6fb432dd095eb99fa9 100644
--- a/hdf_service/distributed_audio/mfc_test/distributedaudiotest.cpp
+++ b/hdf_service/distributed_audio/mfc_test/distributedaudiotest.cpp
@@ -60,7 +60,7 @@ int32_t g_frameNum = 0;
 int32_t g_frameIndex = 0;
 int32_t g_micFrameNum = 0;
 bool g_isInitRenderData = false;
-std::vector<uint8_t*> renderData;
+static std::vector<uint8_t*> renderData;
 
 static DeviceStatus g_spkStatus = DEVICE_IDLE;
 static DeviceStatus g_micStatus = DEVICE_IDLE;