diff --git a/core/client/assets/vendor/shortcuts.js b/core/client/assets/vendor/shortcuts.js
index 32ce8a5331..13105b9966 100644
--- a/core/client/assets/vendor/shortcuts.js
+++ b/core/client/assets/vendor/shortcuts.js
@@ -43,6 +43,7 @@ shortcut = {
             //Find Which key is pressed
             if (e.keyCode) code = e.keyCode;
             else if (e.which) code = e.which;
+            else return;
             var character = String.fromCharCode(code).toLowerCase();
             
             if(code == 188) character=","; //If the user presses , when the type is onkeydown
@@ -220,4 +221,4 @@ shortcut = {
         else if(ele.removeEventListener) ele.removeEventListener(type, callback, false);
         else ele['on'+type] = false;
     }
-};
\ No newline at end of file
+};