diff --git a/lib/gitlab/backend/grack_auth.rb b/lib/gitlab/backend/grack_auth.rb
index 1e858701..abbee613 100644
--- a/lib/gitlab/backend/grack_auth.rb
+++ b/lib/gitlab/backend/grack_auth.rb
@@ -1,3 +1,5 @@
+require_relative 'shell_env'
+
 module Grack
   class Auth < Rack::Auth::Basic
     attr_accessor :user, :project