diff --git a/lib/6to5/browser.js b/lib/6to5/browser.js
index fb7561ca57..acc8ea0261 100644
--- a/lib/6to5/browser.js
+++ b/lib/6to5/browser.js
@@ -59,15 +59,15 @@ transform.load = function (url, callback, opts, hold) {
 
 var runScripts = function () {
   var scripts = [];
-  var types   = ["text/ecmascript-6"];
+  var types   = ["text/ecmascript-6", "text/6to5"];
   var index   = 0;
 
-  var execute = function () {
+  var exec = function () {
     var param = scripts[index];
     if (param instanceof Array) {
       transform.run.apply(transform, param);
       index++;
-      execute();
+      exec();
     }
   };
 
@@ -77,7 +77,7 @@ var runScripts = function () {
     if (script.src) {
       transform.load(script.src, function(param) {
         scripts[i] = param;
-        execute();
+        exec();
       }, opts, true);
     } else {
       opts.filename = "embedded";
@@ -95,7 +95,7 @@ var runScripts = function () {
     run(scripts[i], i);
   }
 
-  execute();
+  exec();
 };
 
 if (window.addEventListener) {