http.conf redirect www. traffic

Hey Everyone!

I have this little snippet

PHP Code:

---

RewriteEngine On
RewriteCond %{HTTP_HOST} ^www\.(.*)$ [NC]
RewriteRule ^(.*)$ http://%1/$1 [R=301,L] 


---

to redirect from
www.example.com/
to
example.com/

However it actually redirects to
example.com//

I remember having this issue in the past and adding a / into the regex to fix it, but I can't remember now.
Thanks,
Keebs