diff --git a/src/ace/ace.js b/src/ace/ace.js
index 8574d653..d0d5a371 100644
--- a/src/ace/ace.js
+++ b/src/ace/ace.js
@@ -292,12 +292,12 @@ ace.addKeyListener = function(el, callback) {
   var lastDown = null;
 
   ace.addListener(el, "keydown", function(e) {
-      lastDown = e.keyCode;
+      lastDown = e.keyIdentifier || e.keyCode;
       return callback(e);
   });
 
   ace.addListener(el, "keypress", function(e) {
-      var keyId = e.keyCode;
+      var keyId = e.keyIdentifier || e.keyCode;
       if (lastDown !== keyId) {
           return callback(e);
       } else {