diff --git a/lib/client/listeners.js b/lib/client/listeners.js
index 9f3e8b94..4e1ee409 100644
--- a/lib/client/listeners.js
+++ b/lib/client/listeners.js
@@ -232,7 +232,7 @@ var Util, DOM, CloudFunc, CloudCmd;
                 
                 toggle          = function() {
                     forEach.call(panels, function(panel) {
-                        panel.classList.toggleClass('selected-panel');
+                        panel.classList.toggle('selected-panel');
                     });
                 },
                 onDrop          = function(event) {