diff --git a/lib/6to5/transformation/modules/common-interop.js b/lib/6to5/transformation/modules/common-interop.js
index ad378606c0..d8ffdf134e 100644
--- a/lib/6to5/transformation/modules/common-interop.js
+++ b/lib/6to5/transformation/modules/common-interop.js
@@ -3,9 +3,8 @@ module.exports = CommonJSInteropFormatter;
 var CommonJSFormatter = require("./common");
 var util              = require("../../util");
 var t                 = require("../../types");
-var _                 = require("lodash");
 
-function CommonJSInteropFormatter(file) {
+function CommonJSInteropFormatter() {
   this.has = false;
   CommonJSFormatter.apply(this, arguments);
 }
@@ -29,7 +28,7 @@ CommonJSInteropFormatter.prototype.importSpecifier = function (specifier, node,
   }
 };
 
-CommonJSInteropFormatter.prototype.export = function (node, nodes, parent) {
+CommonJSInteropFormatter.prototype.export = function (node, nodes) {
   if (node.default && !this.has) {
     var declar = node.declaration;
 
@@ -48,7 +47,7 @@ CommonJSInteropFormatter.prototype.export = function (node, nodes, parent) {
   CommonJSFormatter.prototype.export.apply(this, arguments);
 };
 
-CommonJSInteropFormatter.prototype.exportSpecifier = function (specifier, node, nodes) {
+CommonJSInteropFormatter.prototype.exportSpecifier = function () {
   this.has = true;
   CommonJSFormatter.prototype.exportSpecifier.apply(this, arguments);
 };