diff --git a/src/ib.cc b/src/ib.cc
index 1c7c0c71..db8e0325 100644
--- a/src/ib.cc
+++ b/src/ib.cc
@@ -383,6 +383,10 @@ int mscclppIbQp::stageSendWithImm(struct mscclppIbMr *ibMr, const mscclppIbMrInf
 
 int mscclppIbQp::postSend()
 {
+  if (this->wrn == 0) {
+    return 0;
+  }
+
   struct ibv_send_wr *bad_wr;
   int ret = ibv_post_send(this->qp, this->wrs, &bad_wr);
   if (ret != 0) {