Wis. Stat. § 961.46: Distribution to persons under age 18.

If a person 17 years of age or over violates s. 961.41 (1) by distributing or delivering a controlled substance or a controlled substance analog to a person 17 years of age or under who is at least 3 years his or her junior, the applicable maximum term of imprisonment prescribed under s. 961.41 (1) for the offense may be increased by not more than 5 years.