diff --git a/demos/tabs/sortable.html b/demos/tabs/sortable.html
index 5cfe9e92e..1b0d458bd 100644
--- a/demos/tabs/sortable.html
+++ b/demos/tabs/sortable.html
@@ -10,7 +10,7 @@
 	<link type="text/css" href="../demos.css" rel="stylesheet" />
 	<script type="text/javascript">
 	$(function() {
-		$("#tabs").tabs().find(".ui-tabs-nav").sortable();
+		$("#tabs").tabs().find(".ui-tabs-nav").sortable({axis:'x'});
 	});
 	</script>
 </head>