Issue #3666 has been updated by Hiroki Najima. Hello, I'm also perplexed with this problem. http://github.com/nazy/ruby-ldap/wiki/How-to-compile-ruby-ldap-on-Windows. I hope you'll accept this patch. Regards, ---------------------------------------- http://redmine.ruby-lang.org/issues/show/3666 ---------------------------------------- http://redmine.ruby-lang.org