diff --git a/addons/im/static/src/js/im.js b/addons/im/static/src/js/im.js
index 6fbf452f974..870e32f4bc6 100644
--- a/addons/im/static/src/js/im.js
+++ b/addons/im/static/src/js/im.js
@@ -83,7 +83,7 @@
             });
         },
         calc_box: function() {
-            var $topbar = instance.client.$(".oe_topbar");
+            var $topbar = instance.client.$(".navbar");
             var top = $topbar.offset().top + $topbar.height();
             top = Math.max(top - $(window).scrollTop(), 0);
             this.$el.css("top", top);
diff --git a/addons/portal_anonymous/static/src/js/portal_anonymous.js b/addons/portal_anonymous/static/src/js/portal_anonymous.js
index d4f6351efc9..b289db2053f 100644
--- a/addons/portal_anonymous/static/src/js/portal_anonymous.js
+++ b/addons/portal_anonymous/static/src/js/portal_anonymous.js
@@ -71,7 +71,7 @@ openerp.portal_anonymous = function(instance) {
             this.$el.find('a.login').click(function() {
                 var p = self.getParent();
                 var am = p.action_manager;
-                p.$el.find('.oe_leftbar, .oe_topbar').hide();
+                p.$el.find('.oe_leftbar, .navbar').hide();
                 self.session.session_logout().done(function () {
                     am.do_action({
                         type:'ir.actions.client',