diff --git a/lib/faye/websocket.rb b/lib/faye/websocket.rb
index d5a465c..4f61213 100644
--- a/lib/faye/websocket.rb
+++ b/lib/faye/websocket.rb
@@ -1,6 +1,7 @@
 require 'base64'
 require 'digest/md5'
 require 'digest/sha1'
+require 'forwardable'
 require 'net/http'
 require 'uri'