diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c
index 2303a8c206..60747a6f93 100644
--- a/hw/virtio/vhost.c
+++ b/hw/virtio/vhost.c
@@ -1081,7 +1081,7 @@ static void vhost_virtqueue_stop(struct vhost_dev *dev,
 
     r = dev->vhost_ops->vhost_get_vring_base(dev, &state);
     if (r < 0) {
-        VHOST_OPS_DEBUG("vhost VQ %d ring restore failed: %d", idx, r);
+        VHOST_OPS_DEBUG("vhost VQ %u ring restore failed: %d", idx, r);
         /* Connection to the backend is broken, so let's sync internal
          * last avail idx to the device used idx.
          */