diff --git a/lib/rets4r.rb b/lib/rets4r.rb
index <HASH>..<HASH> 100644
--- a/lib/rets4r.rb
+++ b/lib/rets4r.rb
@@ -2,6 +2,7 @@ module RETS4R # :nodoc:
   VERSION = '1.1.18'
 end
 
+require 'rets4r/auth'
 require 'rets4r/client'
 require 'rets4r/client/parsers/compact_nokogiri'
 require 'rets4r/listing_mapper'
re-adding a require for 'rets4r/auth', this was causing errors on <I> for me. adding the line fixed it