diff --git a/horizon/templates/horizon/common/_region_selector.html b/horizon/templates/horizon/common/_region_selector.html
index 8914892bfd..8de2036ee4 100644
--- a/horizon/templates/horizon/common/_region_selector.html
+++ b/horizon/templates/horizon/common/_region_selector.html
@@ -1,7 +1,7 @@
 {% load url from future %}
 {% if regions.support %}
   <div id="region_switcher" class="dropdown switcher_bar" tabindex='1'>
-    <button class="btn btn-default btn-topnav dropdown-toggle" data-toggle="dropdown">
+    <button class="btn btn-default btn-topnav dropdown-toggle">
       {{ regions.current.name }}
       <span class="caret"></span>
     </button>