diff --git a/block/nbd.c b/block/nbd.c
index 97683cce27..494b9d683e 100644
--- a/block/nbd.c
+++ b/block/nbd.c
@@ -983,11 +983,12 @@ static void nbd_iter_request_error(NBDReplyChunkIter *iter, int ret)
  * nbd_reply_chunk_iter_receive
  * The pointer stored in @payload requires g_free() to free it.
  */
-static bool nbd_reply_chunk_iter_receive(BDRVNBDState *s,
-                                         NBDReplyChunkIter *iter,
-                                         uint64_t handle,
-                                         QEMUIOVector *qiov, NBDReply *reply,
-                                         void **payload)
+static bool coroutine_fn nbd_reply_chunk_iter_receive(BDRVNBDState *s,
+                                                      NBDReplyChunkIter *iter,
+                                                      uint64_t handle,
+                                                      QEMUIOVector *qiov,
+                                                      NBDReply *reply,
+                                                      void **payload)
 {
     int ret, request_ret;
     NBDReply local_reply;