Creating dualstack alias in aws_route53_record

Hi,
I wrote the following in my tf file:

resource “aws_route53_record” “just_a_name” {
zone_id = “zone_id_string”
name = “just_a_name2”
type = “A”

alias {
name = aws_lb.lb_object.dns_name
zone_id = aws_lb.lb_object.zone_id
evaluate_target_health = false
}
}

running terraform apply results in an A record with the dns alias, how do i add the dualstack prefix?
Thanks