diff --git a/lib/iirc/bot.rb b/lib/iirc/bot.rb
index b9b914e..1c80e5d 100644
--- a/lib/iirc/bot.rb
+++ b/lib/iirc/bot.rb
@@ -29,6 +29,7 @@ def initialize(socket=nil, user={})
 
     def register!
       ensure_registration_info!
+      self << "PASS :#{me.password}" if me.password
       self << "USER #{me.username} 0 0 :#{me.realname}"
       self << "NICK #{me.nick}"
     end
@@ -39,4 +40,4 @@ def register!
       raise ArgumentError.new('no nick given') unless me.nick && !me.nick.empty?
     end
   end
-end
\ No newline at end of file
+end