diff --git a/index.js b/index.js
index b16bcea..809bdb5 100755
--- a/index.js
+++ b/index.js
@@ -1,4 +1,4 @@
-fs = require('fs');
+var fs = require('fs');
 module.exports = function(file_path, callback){
 
 	var insertTabs = function(num_tabs) {