diff --git a/include/os/osMemory.h b/include/os/osMemory.h
index 3f57c72933115c5b34296f5730e81b656a53f50d..c35fd782fbb1d5a4b585ef735d179a09ce0d691e 100644
--- a/include/os/osMemory.h
+++ b/include/os/osMemory.h
@@ -29,9 +29,12 @@ extern "C" {
 #define calloc  CALLOC_FUNC_TAOS_FORBID
 #define realloc REALLOC_FUNC_TAOS_FORBID
 #define free    FREE_FUNC_TAOS_FORBID
+#ifdef  strdup
+#undef  strdup
 #define strdup  STRDUP_FUNC_TAOS_FORBID
-#endif // ifndef ALLOW_FORBID_FUNC
+#endif
 
+#endif // ifndef ALLOW_FORBID_FUNC
 #endif // if !defined(WINDOWS)
 
 int32_t taosMemoryDbgInit();