diff --git a/lib/6to5/transformation/transformers/es6/parameters.rest.js b/lib/6to5/transformation/transformers/es6/parameters.rest.js
index 9ca249628c..da79fec0ef 100644
--- a/lib/6to5/transformation/transformers/es6/parameters.rest.js
+++ b/lib/6to5/transformation/transformers/es6/parameters.rest.js
@@ -12,8 +12,6 @@ exports.Function = function (node, parent, scope) {
 
   var rest = node.params.pop().argument;
 
-  t.ensureBlock(node);
-
   var argsId = t.identifier("arguments");
 
   // otherwise `arguments` will be remapped in arrow functions