diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index 9cb8668..2075981 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -1141,7 +1141,7 @@
 	}
 
 	err = xenbus_gather(XBT_NIL, info->xbdev->otherend,
-			    "feature-barrier", "%lu", &barrier,
+			    "feature-barrier", "%d", &barrier,
 			    NULL);
 
 	/*