diff --git a/lib/rex/socket.rb b/lib/rex/socket.rb
index bcbb711..e9951e8 100644
--- a/lib/rex/socket.rb
+++ b/lib/rex/socket.rb
@@ -4,7 +4,7 @@
 require 'thread'
 require 'resolv'
 require 'rex/exceptions'
-require 'dnsruby'
+autoload :Dnsruby, 'dnsruby'
 
 module Rex