diff --git a/www/common/common-ui-elements.js b/www/common/common-ui-elements.js
index 64109e0e5..4d8adc6b4 100644
--- a/www/common/common-ui-elements.js
+++ b/www/common/common-ui-elements.js
@@ -1127,7 +1127,7 @@ define([
 
         $toolbarButton.attr('title', Messages.show_help_button);
 
-        var toggleHelp = function (forceClose) {
+        var toggleHelp = function () {
             $toolbarButton.removeClass('cp-toolbar-button-active');
             $(help).addClass('cp-help-hidden');
             common.setAttribute(['hideHelp', type], true);