diff --git a/lib/ace/config.js b/lib/ace/config.js
index 0bdaf786..6b5b3765 100644
--- a/lib/ace/config.js
+++ b/lib/ace/config.js
@@ -71,6 +71,22 @@ exports.all = function() {
     return lang.copyObject(options);
 };
 
+exports.moduleUrl = function(name) {
+    var parts = name.split("/");
+    if (parts[0] !== "ace") return;
+
+    var component = parts[1];
+    var base = parts[2];
+
+    if (component == "mode") {
+        return this.get("modePath") + "/mode-" + base + this.get("suffix");
+    } else if (component === "theme") {
+        return this.get("themePath") + "/theme-" + base + this.get("suffix");
+    } else if (component == "worker") {
+        return this.get("workerPath") + "/" + base + this.get("suffix");
+    }
+};
+
 exports.init = function() {
     options.packaged = require.packaged || module.packaged || (global.define && define.packaged);
 
diff --git a/lib/ace/edit_session.js b/lib/ace/edit_session.js
index b7b0dead..1915991f 100644
--- a/lib/ace/edit_session.js
+++ b/lib/ace/edit_session.js
@@ -835,7 +835,7 @@ var EditSession = function(text, mode) {
         if (!this.$mode)
             this.$setModePlaceholder();
 
-        fetch(function() {
+        fetch(mode, function() {
             require([mode], done);
         });
 
@@ -852,13 +852,11 @@ var EditSession = function(text, mode) {
             callback(_self.$modes[mode]);
         }
 
-        function fetch(callback) {
+        function fetch(name, callback) {
             if (!config.get("packaged"))
                 return callback();
 
-            var base = mode.split("/").pop();
-            var filename = config.get("modePath") + "/mode-" + base + ".js";
-            net.loadScript(filename, callback);
+            net.loadScript(config.moduleUrl(name), callback);
         }
     };
 
diff --git a/lib/ace/virtual_renderer.js b/lib/ace/virtual_renderer.js
index eb6a17c7..632b944f 100644
--- a/lib/ace/virtual_renderer.js
+++ b/lib/ace/virtual_renderer.js
@@ -1288,9 +1288,7 @@ var VirtualRenderer = function(container, theme) {
         if (!config.get("packaged"))
             return callback();
 
-        var base = name.split("/").pop();
-        var filename = config.get("themePath") + "/theme-" + base + config.get("suffix");
-        net.loadScript(filename, callback);
+        net.loadScript(config.moduleUrl(name), callback);
     };
 
     /**
diff --git a/lib/ace/worker/worker_client.js b/lib/ace/worker/worker_client.js
index 609e981c..7b257d36 100644
--- a/lib/ace/worker/worker_client.js
+++ b/lib/ace/worker/worker_client.js
@@ -47,7 +47,7 @@ var WorkerClient = function(topLevelNamespaces, packagedJs, mod, classname) {
     this.changeListener = this.changeListener.bind(this);
 
     if (config.get("packaged")) {
-        this.$worker = new Worker(config.get("workerPath") + "/" + packagedJs);
+        this.$worker = new Worker(config.moduleUrl(mod));
     }
     else {
         var workerUrl;