diff --git a/bin/unicorn b/bin/unicorn
index a9b9e04efba..6437aced5eb 100755
--- a/bin/unicorn
+++ b/bin/unicorn
@@ -9,6 +9,7 @@ RAILS_ROOT = File.expand_path("../../", Pathname.new(__FILE__).realpath)
 require 'rubygems'
 require 'bundler/setup'
 require 'digest'
+require 'fileutils'
 
 dev_mode = false