diff --git a/lib/6to5/transformation/transformers/index.js b/lib/6to5/transformation/transformers/index.js
index 05affb79d9..fea0e8ee5b 100644
--- a/lib/6to5/transformation/transformers/index.js
+++ b/lib/6to5/transformation/transformers/index.js
@@ -47,11 +47,12 @@ module.exports = {
 
   "es6.constants":                         require("./es6/constants"),
 
+  // needs to be before `es6.parameters.default` as default parameters will destroy the rest param
+  "es6.parameters.rest":                   require("./es6/parameters.rest"),
+
   // needs to be before `es6.blockScoping` as default parameters have a TDZ
   "es6.parameters.default":                require("./es6/parameters.default"),
 
-  "es6.parameters.rest":                   require("./es6/parameters.rest"),
-
   // needs to be before `es6.blockScoping` as let variables may be produced
   "es6.destructuring":                     require("./es6/destructuring"),