diff --git a/lib/net/ldap.rb b/lib/net/ldap.rb
index cfe10ee..ab1f763 100644
--- a/lib/net/ldap.rb
+++ b/lib/net/ldap.rb
@@ -44,6 +44,7 @@ require 'socket'
 require 'net/ber'
 require 'net/ldap/pdu'
 require 'net/ldap/filter'
+require 'net/ldap/dataset'
 
 
 module Net