
    list_filter = CustomUserAdmin.list_filter + ('department',)
    list_display = CustomUserAdmin.list_display + ('department',)
    fieldsets = CustomUserAdmin.fieldsets + (
        (None, {'fields' : ('department',)},),
    )
    add_fieldsets = CustomUserAdmin.add_fieldsets + (
        (None, {
            'classes' : ('wide',),
            'fields' : ('department',)}