Code:
rewritecond %{http_host} ^domain.com [nc]
rewriterule ^(.*)$ http://www.domain.com/$1 [r=301,nc]
so you'll want the opposite
Code:
rewritecond %{http_host} ^www.domain.com [nc]
rewriterule ^(.*)$ http://domain.com/$1 [r=301,nc]
edit: beaten to it
