Can I make regex-replace-all search being case insensitive ? Isn't there a direct option for that ? I've seen such an option in create-scanner , but I need nothing else than regex-replace-all, and I do not understand how to deal with create-scanner. Thanks Mario (clisp newbie) P.S. I'd like to give you my best compliments for your great job with ppcre, it's really fast and reliable, keep up the good work!