diff --git a/source/os/src/osSemaphore.c b/source/os/src/osSemaphore.c
index 708c18aa3f..e61fd627eb 100644
--- a/source/os/src/osSemaphore.c
+++ b/source/os/src/osSemaphore.c
@@ -276,7 +276,7 @@ int32_t taosGetPIdByName(const char* name, int32_t* pPId) {
     }
   }
 
-  closedir(dir);
+  TAOS_UNUSED(closedir(dir));
 
   if ((*pPId) == -1) {
     return TAOS_SYSTEM_ERROR(ESRCH);