[Plugin: All in One SEO Pack] Canonical Domain

I noticed there was a setting to enable a canonical domain, but can’t seem to find a way to specify what it should be. Seems like the domain is being redirected to the non-www version, but I’d like to direct it to www. Is there a way to do this? Or am I missing something? Thank you in advance.

http://wordpress.org/extend/plugins/all-in-one-seo-pack/