diff --git a/lib/ace/virtual_renderer.js b/lib/ace/virtual_renderer.js
index f0e93fbc..6c82f5d2 100644
--- a/lib/ace/virtual_renderer.js
+++ b/lib/ace/virtual_renderer.js
@@ -618,7 +618,7 @@ var VirtualRenderer = function(container, theme) {
     this.setTheme = function(theme) {
         var _self = this;
         if (!theme || typeof theme == "string") {
-            theme = theme || "ace/theme/TextMate";
+            theme = theme || "ace/theme/textmate";
             require([theme], function(theme) {
                 afterLoad(theme);
             });