diff --git a/source/libs/transport/src/trans.c b/source/libs/transport/src/trans.c
index fa0be7bcd8..0881f91d69 100644
--- a/source/libs/transport/src/trans.c
+++ b/source/libs/transport/src/trans.c
@@ -140,6 +140,7 @@ void* rpcMallocCont(int64_t contLen) {
   char*   start = taosMemoryCalloc(1, size);
   if (start == NULL) {
     tError("failed to malloc msg, size:%" PRId64, size);
+    terrno = TSDB_CODE_OUT_OF_MEMORY;
     return NULL;
   } else {
     tTrace("malloc mem:%p size:%" PRId64, start, size);