diff --git a/tools/utils.js b/tools/utils.js
index 4c8a68bebe..1f39219d88 100644
--- a/tools/utils.js
+++ b/tools/utils.js
@@ -1,4 +1,3 @@
-var Fibers = require('fibers');
 var Future = require('fibers/future');
 var readline = require('readline');
 var _ = require('underscore');