diff --git a/build/Gruntfile.coffee b/build/Gruntfile.coffee
index 860616745..e4fbb39c6 100644
--- a/build/Gruntfile.coffee
+++ b/build/Gruntfile.coffee
@@ -3,7 +3,7 @@ path = require 'path'
 os = require 'os'
 glob = require 'glob'
 usesBabel = require './lib/uses-babel'
-babelOptions = require('../static/babelrc.json')
+babelOptions = require '../static/babelrc'
 
 # Add support for obselete APIs of vm module so we can make some third-party
 # modules work under node v0.11.x.