diff --git a/hw/virtio-blk.c b/hw/virtio-blk.c
index 8734029..cff2298 100644
--- a/hw/virtio-blk.c
+++ b/hw/virtio-blk.c
@@ -131,7 +131,7 @@ static void complete_one_request(VirtIOBlockRequest *req, VirtIOBlock *s, ssize_
      * written to, but for virtio-blk it seems to be the number of bytes
      * transferred plus the status bytes.
      */
-    vring_push(&s->vring, req->head, len + sizeof req->status);
+    vring_push(&s->vring, req->head, len + sizeof(*req->status));
 }
 
 static bool is_request_merged(VirtIOBlockRequest *req)