diff --git a/Makefile.dryice.js b/Makefile.dryice.js
index 1d258db7..73abf1c1 100755
--- a/Makefile.dryice.js
+++ b/Makefile.dryice.js
@@ -417,9 +417,7 @@ var buildAce = function(options) {
             source: [{
                 project: workerProject,
                 require: [
-                    'ace/lib/fixoldbrowsers',
-                    'ace/lib/event_emitter',
-                    'ace/lib/oop',
+                    'ace/worker/worker',
                     'ace/mode/' + mode + '_worker'
                 ]
             }],
@@ -428,7 +426,6 @@ var buildAce = function(options) {
         });
         copy({
             source: [
-                ACE_HOME + "/lib/ace/worker/worker.js",
                 worker
             ],
             filter: options.compress ? [copy.filter.uglifyjs] : [],
diff --git a/lib/ace/worker/worker.js b/lib/ace/worker/worker.js
index 96ab3989..b0f1a5e7 100644
--- a/lib/ace/worker/worker.js
+++ b/lib/ace/worker/worker.js
@@ -38,6 +38,10 @@ window.normalizeModule = function(parentId, moduleName) {
 };
 
 window.require = function(parentId, id) {
+    if (!id) {
+        id = parentId
+        parentId = null;
+    }
     if (!id.charAt)
         throw new Error("worker.js require() accepts only (parentId, id) as arguments");
 
@@ -58,7 +62,7 @@ window.require = function(parentId, id) {
     
     require.id = id;
     importScripts(path);
-    return require(parentId, id);    
+    return require(parentId, id);
 };
 
 require.modules = {};
@@ -102,8 +106,8 @@ window.initBaseUrls  = function initBaseUrls(topLevelNamespaces) {
 
 window.initSender = function initSender() {
 
-    var EventEmitter = require(null, "ace/lib/event_emitter").EventEmitter;
-    var oop = require(null, "ace/lib/oop");
+    var EventEmitter = require("ace/lib/event_emitter").EventEmitter;
+    var oop = require("ace/lib/oop");
     
     var Sender = function() {};
     
@@ -145,9 +149,9 @@ window.onmessage = function(e) {
     }
     else if (msg.init) {        
         initBaseUrls(msg.tlns);
-        require(null, "ace/lib/fixoldbrowsers");
+        require("ace/lib/es5-shim");
         sender = initSender();
-        var clazz = require(null, msg.module)[msg.classname];
+        var clazz = require(msg.module)[msg.classname];
         main = new clazz(sender);
     } 
     else if (msg.event && sender) {