diff --git a/source/libs/qworker/test/qworkerTests.cpp b/source/libs/qworker/test/qworkerTests.cpp
index 8c5e802ef995998d38a2d03584145253216b01d5..8a48977c777af8d794a38ed1721319c4b0646953 100644
--- a/source/libs/qworker/test/qworkerTests.cpp
+++ b/source/libs/qworker/test/qworkerTests.cpp
@@ -140,7 +140,7 @@ void qwtBuildDropReqMsg(STaskDropReq *dropMsg, SRpcMsg *dropRpc) {
     return;
   }
   
-  char *msg = taosMemoryCalloc(1, msgSize);
+  char *msg = (char*)taosMemoryCalloc(1, msgSize);
   if (NULL == msg) {
     return;
   }