diff --git a/lib/6to5/transformation/transformers/let-scoping.js b/lib/6to5/transformation/transformers/let-scoping.js
index d7d7709b05..2138eb1c8b 100644
--- a/lib/6to5/transformation/transformers/let-scoping.js
+++ b/lib/6to5/transformation/transformers/let-scoping.js
@@ -1,4 +1,5 @@
 var traverse = require("../../traverse");
+var util     = require("../../util");
 var t        = require("../../types");
 var _        = require("lodash");