diff --git a/xCAT-server/lib/xcat/plugins/xen.pm b/xCAT-server/lib/xcat/plugins/xen.pm
index 7a7ed58c9..691d360c6 100644
--- a/xCAT-server/lib/xcat/plugins/xen.pm
+++ b/xCAT-server/lib/xcat/plugins/xen.pm
@@ -414,7 +414,7 @@ sub makedom {
     if ($dom) {
            refresh_vm($dom);
     }
-    return $dom;
+    return $dom,undef;
 }