max number of groups 32?

[Madarasz Karoly <mkaroly@SoftHome.net>]

Hello!

I try to add users to groups with adduser, and
usermod complains about max number of groups, which is 32,
so I can't add a user to more than 32 groups.

Is there a limitation to 32 of maximum number of groups
that a user can be a member?
If it is, can be changed to 64?

By,
Karesz.