diff --git a/lib/6to5/transformation/transformers/es6/tail-call.js b/lib/6to5/transformation/transformers/es6/tail-call.js
index 9ebf682220..0f38fb697e 100644
--- a/lib/6to5/transformation/transformers/es6/tail-call.js
+++ b/lib/6to5/transformation/transformers/es6/tail-call.js
@@ -1,5 +1,6 @@
 "use strict";
 
+/*
 var t    = require("../../../types");
 
 function transformExpression(node, scope, state) {
@@ -84,8 +85,6 @@ var functionVisitor = {
 
 exports.FunctionDeclaration =
 exports.FunctionExpression = function (node, parent, scope, file) {
-  return;
-
   var tempId, helperRef;
 
   var state = {
@@ -116,3 +115,4 @@ exports.FunctionExpression = function (node, parent, scope, file) {
     ]));
   }
 };
+*/