diff --git a/lib/coffee_script/runner.js b/lib/coffee_script/runner.js
index cdda8327..592b43de 100644
--- a/lib/coffee_script/runner.js
+++ b/lib/coffee_script/runner.js
@@ -1,6 +1,7 @@
 (function(){
   var coffee, paths;
   // Quickie script to compile and run all the files given as arguments.
+  process.mixin(require('sys'));
   coffee = require('./coffee-script');
   paths = process.ARGV;
   paths = paths.slice(2, paths.length);
diff --git a/src/runner.coffee b/src/runner.coffee
index 7e7b7b69..8ad7ffb5 100644
--- a/src/runner.coffee
+++ b/src/runner.coffee
@@ -1,5 +1,6 @@
 # Quickie script to compile and run all the files given as arguments.
 
+process.mixin require 'sys'
 coffee: require './coffee-script'
 
 paths: process.ARGV