diff --git a/lib/client/keyBinding.js b/lib/client/keyBinding.js
index f5497f82..eba17c09 100644
--- a/lib/client/keyBinding.js
+++ b/lib/client/keyBinding.js
@@ -328,7 +328,7 @@ CloudCommander.keyBinding = (function(){
              * устанавливаем все обработчики
              * нажатий клавиш
              */             
-            else if(event.keyCode === lKEY.S &&
+            else if(event && event.keyCode === lKEY.S &&
                 event.altKey){
                     /* обрабатываем нажатия на клавиши*/
                     CloudCommander.keyBinded = true;