diff --git a/lib/6to5/transformation/helpers/define-map.js b/lib/6to5/transformation/helpers/define-map.js
index 0019351782..b463e9045e 100644
--- a/lib/6to5/transformation/helpers/define-map.js
+++ b/lib/6to5/transformation/helpers/define-map.js
@@ -1,7 +1,9 @@
-var clone = require("lodash/lang/clone");
-var each  = require("lodash/collection/each");
-var has   = require("lodash/object/has");
-var t     = require("../../types");
+var cloneDeep = require("lodash/lang/cloneDeep");
+var traverse  = require("../../traverse");
+var clone      = require("lodash/lang/clone");
+var each      = require("lodash/collection/each");
+var has       = require("lodash/object/has");
+var t         = require("../../types");
 
 exports.push = function (mutatorMap, key, kind, computed, value) {
   var alias;
diff --git a/lib/6to5/transformation/transformers/es5/properties.mutators.js b/lib/6to5/transformation/transformers/es5/properties.mutators.js
index 515ed5fd01..40b87e6fe4 100644
--- a/lib/6to5/transformation/transformers/es5/properties.mutators.js
+++ b/lib/6to5/transformation/transformers/es5/properties.mutators.js
@@ -1,7 +1,6 @@
 "use strict";
 
 var defineMap = require("../../helpers/define-map");
-var util      = require("../../../util");
 var t         = require("../../../types");
 
 exports.ObjectExpression = function (node) {
diff --git a/lib/6to5/util.js b/lib/6to5/util.js
index 17f120f288..f60534e3bb 100644
--- a/lib/6to5/util.js
+++ b/lib/6to5/util.js
@@ -16,7 +16,6 @@ var isNumber   = require("lodash/lang/isNumber");
 var isString   = require("lodash/lang/isString");
 var isRegExp   = require("lodash/lang/isRegExp");
 var isEmpty    = require("lodash/lang/isEmpty");
-var clone      = require("lodash/lang/clone");
 var cloneDeep  = require("lodash/lang/cloneDeep");
 var has        = require("lodash/object/has");
 var contains   = require("lodash/collection/contains");