diff --git a/block/nfs.c b/block/nfs.c
index 61a249a..f86e660 100644
--- a/block/nfs.c
+++ b/block/nfs.c
@@ -721,7 +721,7 @@
     }
 
     /* Set task->complete before reading bs->wakeup.  */
-    atomic_mb_set(&task->complete, 1);
+    qatomic_mb_set(&task->complete, 1);
     bdrv_wakeup(task->bs);
 }