diff --git a/ChangeLog b/ChangeLog
index 314346eeab..6efe3ba146 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Sat Aug  2 19:18:40 2003  Minero Aoki  <aamine@loveruby.net>
+
+	* lib/net/smtp.rb: respond_to? needs 2nd argument.
+	  Thanks Jim Bob.  [ruby-talk:77796]
+
 Sat Aug  2 15:11:54 2003  WATANABE Hirofumi  <eban@ruby-lang.org>
 
 	* ext/extmk.rb (--no-undefined): annoying option removed.
diff --git a/lib/net/smtp.rb b/lib/net/smtp.rb
index ba4f43c377..8c271ad45e 100644
--- a/lib/net/smtp.rb
+++ b/lib/net/smtp.rb
@@ -520,7 +520,7 @@ module Net
                       unless user and secret
       auth_method = "auth_#{authtype || 'cram_md5'}"
       raise ArgumentError, "wrong auth type #{authtype}"\
-                      unless respond_to?(auth_method)
+                      unless respond_to?(auth_method, true)
     end
 
     def authenticate( user, secret, authtype )