diff --git a/lib/6to5/transformation/transformers/es6-rest-parameters.js b/lib/6to5/transformation/transformers/es6-rest-parameters.js
index 07eaf67870..a3d8e9a801 100644
--- a/lib/6to5/transformation/transformers/es6-rest-parameters.js
+++ b/lib/6to5/transformation/transformers/es6-rest-parameters.js
@@ -1,7 +1,7 @@
 var util = require("../../util");
 var t    = require("../../types");
 
-exports.Function = function (node, parent, file, scope) {
+exports.Function = function (node, parent, file) {
   if (!node.rest) return;
 
   var rest = node.rest;