diff --git a/lib/6to5/transformation/transform.js b/lib/6to5/transformation/transform.js
index 216b2987e2..9d869360e8 100644
--- a/lib/6to5/transformation/transform.js
+++ b/lib/6to5/transformation/transform.js
@@ -29,7 +29,6 @@ transform.moduleFormatters = {
 _.each({
   modules:                   require("./transformers/modules"),
   propertyNameShorthand:     require("./transformers/property-name-shorthand"),
-  constants:                 require("./transformers/constants"),
   arrayComprehension:        require("./transformers/array-comprehension"),
   generatorComprehension:    require("./transformers/generator-comprehension"),
   arrowFunctions:            require("./transformers/arrow-functions"),
@@ -45,9 +44,11 @@ _.each({
   restParameters:            require("./transformers/rest-parameters"),
   destructuring:             require("./transformers/destructuring"),
   forOf:                     require("./transformers/for-of"),
-  letScoping:                require("./transformers/let-scoping"),
   unicodeRegex:              require("./transformers/unicode-regex"),
 
+  constants:                 require("./transformers/constants"),
+  letScoping:                require("./transformers/let-scoping"),
+
   react:                     require("./transformers/react"),
 
   _aliasFunctions:           require("./transformers/_alias-functions"),