diff --git a/lib/ace/keyboard/keybinding.js b/lib/ace/keyboard/keybinding.js
index 02ef6992..6aab9452 100644
--- a/lib/ace/keyboard/keybinding.js
+++ b/lib/ace/keyboard/keybinding.js
@@ -71,7 +71,7 @@ var KeyBinding = function(editor) {
     };
 
     this.getKeyboardHandler = function() {
-        return this.$handlers[this.$handlers - 1];
+        return this.$handlers[this.$handlers.length - 1];
     };
 
     this.$callKeyboardHandlers = function (hashId, keyString, keyCode, e) {