prevent default scope from being applied to acts_as_list

I use acts_as_list to generate slot numbers of books:

acts_as_list :scope => :book_id, :column => :slot

and have a default scope that prevents deleted (soft delete) books from getting in to result sets:

default_scope where(:is_active => true)

I want to prevent the default scope from getting applied to the acts_as_list declaration, because if someone deletes the last book, and creates a new one, they get the same slot number (because when it fetches the last slot number, the default scope gets applied and it doesn't get the deleted entry). I am aware of unscoped, but how do I use it with acts_as_list?

I am using Rails 3.0.11.

wherever you use acts_as_list

just do this instead,

unscoped.acts_as_list