Redirect http->https, but exclude subdomain

I use Drupal, with a complicated multi-Domain setup, and have a local development site, that uses (locally) the dev. subdomain. So I want a .htaccess file that can be used on production AND development. The production site is used with HTTPS, and there is a HTTP->HTTPS redirect in the htaccess file. I just want to NOT redirect to https if on the .dev subdomain: RewriteBase / # use website without "www." RewriteCond %{HTTP_HOST} ^www\.(.+)$ [NC] RewriteRule ^ http%{ENV:protossl}://%1%{REQUEST_URI} [L,R=301] # force HTTPS, but don't if on local development site RewriteCond %{HTTPS} !=on RewriteCond %{ENV:HTTPS} !=on RewriteCond %{HTTP_HOST} !^dev\.(.+)$ [NC] RewriteRule .* https://%{SERVER_NAME}%{REQUEST_URI} [R=301,L] But this does not work, and creates a loop redirect. But I can't see why. Any hints?