Trailing Slash automatically added

Hello,

I created a plug-in that creates Search Engine Friendly URLs for its own pages.

However wordpress is automatically adding a trailing slash to the urls. So http://www.example.com/plugin/some-title.html is redirected with a 301 to http://www.example.com/plugin/some-title.html/

I guess this is done due to the Canonical URLs of wordpresss http://markjaquith.wordpress.com/2007/09/25/wordpress-23-canonical-urls/ which are mostly a good thing, but is there any way to define that in this particular case I want the URL without the trailing slash?

Thanks