rid column not large enough

I have a large amount of roles in my system and was trying to setup the security for tinymce. It would allow me to add it to some, but then kept giving a duplicate key. The issue is that the column data type for rid is not the same as it is for the role table. These two columns should be the same data type/length. I altered the table and was allowed to set the security for all of my roles.

alter table tinymce_role change rid rid int(10) unsigned default 0;

Thanks,
Shane