diff --git a/app/views/tutorials/guard.html.erb b/app/views/tutorials/guard.html.erb
index a657301..befe6cb 100755
--- a/app/views/tutorials/guard.html.erb
+++ b/app/views/tutorials/guard.html.erb
@@ -21,7 +21,7 @@
 <script type="text/javascript">
 
 function openSub(){
-	$('li[id="submenu"]').addClass('open');
+	$('li[id="guard"]').addClass('active');
 	$('li[id="submenu"]').addClass('active open');
 };