diff --git a/file/lib/main.js b/file/lib/main.js
index 9a72fca..f0a8f3d 100644
--- a/file/lib/main.js
+++ b/file/lib/main.js
@@ -1,6 +1,10 @@
 var path = require('path');
 var fs = require('fs');
-var sys = require('sys');
+try{
+  var sys = require('util');
+}catch(e){
+  var sys = require('sys');
+}
 
 exports.mkdirs = function (_path, mode, callback) {
   _path = exports.path.abspath(_path);