diff --git a/drivers/xen/pvcalls-front.c b/drivers/xen/pvcalls-front.c
index afa3f1b5d807646dc949b410b1f00c327b9825fb..d1e1d8d2b9d545b00eb87085b6f941f04900cd74 100644
--- a/drivers/xen/pvcalls-front.c
+++ b/drivers/xen/pvcalls-front.c
@@ -1103,7 +1103,7 @@ static int pvcalls_front_remove(struct xenbus_device *dev)
 			kfree(map);
 		}
 	}
-	if (bedata->ref >= 0)
+	if (bedata->ref != -1)
 		gnttab_end_foreign_access(bedata->ref, 0, 0);
 	kfree(bedata->ring.sring);
 	kfree(bedata);