diff --git a/lib/kiss/kiss.rb b/lib/kiss/kiss.rb
index 6050e356a6b654c6b16858f78820a57dba68c27a..e9bfbbc2de8bf3950721531f86638600ded12466 100644
--- a/lib/kiss/kiss.rb
+++ b/lib/kiss/kiss.rb
@@ -123,7 +123,7 @@ module KISS
         end
 
         public
-        def connect(mode_init=None, *args, **kwargs)
+        def connect(mode_init=nil, *args, **kwargs)
         end
 
         public