diff --git a/lib/jsdoc/fs.js b/lib/jsdoc/fs.js
index 7d26ad72..ee365a8d 100644
--- a/lib/jsdoc/fs.js
+++ b/lib/jsdoc/fs.js
@@ -3,18 +3,12 @@
  * @module jsdoc/fs
  */
 
-var fs = require('fs');
+var fs = exports.fs = require('fs');
 var vm = require('jsdoc/util/vm');
 
-var hasOwnProp = Object.prototype.hasOwnProperty;
-
-// add the VM-specific implementations of the extra methods
+// export the VM-specific implementations of the extra methods
 // TODO: document extra methods here
 var extras = vm.getModule('fs');
-for (var func in extras) {
-    if ( hasOwnProp.call(extras, func) ) {
-        fs[func] = extras[func];
-    }
-}
-
-module.exports = fs;
+Object.keys(extras).forEach(function(extra) {
+    exports[extra] = extras[extra];
+});