RewriteRule ^showthread.php?t=(\d+)&referrerid=(\d+)$ http://www.foo.com/showthread.php?t=$1 [R=301,L] I'm trying to get a URL like: http://www.foo.com/showthread.php?t=71204&referrerid=8315 to redirect to http://www.foo.com/showthread.php?t=71204