diff --git a/cms/templates/container.html b/cms/templates/container.html
index f3f7f292c5..9893cf735e 100644
--- a/cms/templates/container.html
+++ b/cms/templates/container.html
@@ -131,6 +131,6 @@ main_xblock_info = {
     </div>
 </div>
 
-<div class="edit-xblock-modal"/>
+<div class="edit-xblock-modal"></div>
 
 </%block>