diff --git a/lib/ace/ext/beautify.js b/lib/ace/ext/beautify.js
index 41fb1357c7c..b4134b81a1d 100644
--- a/lib/ace/ext/beautify.js
+++ b/lib/ace/ext/beautify.js
@@ -44,7 +44,7 @@ exports.singletonTags = ["area", "base", "br", "col", "command", "embed", "hr",
 // insert a line break after block level tags
 exports.blockTags = ["article", "aside", "blockquote", "body", "div", "dl", "fieldset", "footer", "form", "head", "header", "html", "nav", "ol", "p", "script", "section", "style", "table", "tbody", "tfoot", "thead", "ul"];
 
-exports.beautify = function(session) {
+exports.beautify = function(session, options = {useRequestAnimationFrame:false}) {
     var iterator = new TokenIterator(session, 0, 0);
     var token = iterator.getCurrentToken();
     var tabString = session.getTabString();
@@ -77,6 +77,7 @@ exports.beautify = function(session) {
     var levels = {0: 0};
     var parents = [];
     var caseBody = false;
+    var id;
 
     var trimNext = function() {
         if (nextToken && nextToken.value && nextToken.type !== 'string.regexp')
@@ -409,8 +410,8 @@ exports.beautify = function(session) {
 
         token = nextToken;
     }
-    var id;
-    if(window.requestAnimationFrame){
+    
+    if(options.useRequestAnimationFrame && window.requestAnimationFrame){
         id = requestAnimationFrame(function loop (){
             if(token !== null) {
                 try{