diff --git a/ace/index.html b/ace/index.html
index 47b0d20..334fed6 100644
--- a/ace/index.html
+++ b/ace/index.html
@@ -33,7 +33,7 @@
         });
         // load ace and extensions
         require(["ace/ace", "ace/ext-language_tools"], function(ace) {
-            var buildDom = require("ace/lib/dom").buildDom;
+            //var buildDom = require("ace/lib/dom").buildDom;
             var editor = ace.edit();
             editor.setOptions({
                 theme: "ace/theme/twilight",