diff --git a/app/views/layouts/base_courses.html.erb b/app/views/layouts/base_courses.html.erb
index a79914f61..43adab15f 100644
--- a/app/views/layouts/base_courses.html.erb
+++ b/app/views/layouts/base_courses.html.erb
@@ -26,7 +26,6 @@
 </head>
 <!--add by huang-->
 <body class="<%= h body_css_classes %>">
-<%= render :partial => 'courses/course_ad' %>
 <div id="wrapper">
 <div id="wrapper2">
 <div id="wrapper3">
