diff --git a/lib/6to5/transformation/transformers/default-parameters.js b/lib/6to5/transformation/transformers/default-parameters.js
index 3c754d434b..6a7e394642 100644
--- a/lib/6to5/transformation/transformers/default-parameters.js
+++ b/lib/6to5/transformation/transformers/default-parameters.js
@@ -20,7 +20,7 @@ exports.Function = function (node, parent, file, scope) {
 
     // temporal dead zone check - here we prevent accessing of params that
     // are to the right - ie. uninitialized parameters
-    _.each(ids.slice(i), function (ids, i) {
+    _.each(ids.slice(i), function (ids) {
       var check = function (node, parent) {
         if (!t.isIdentifier(node) || !t.isReferenced(node, parent)) return;