NBA commissioner Adam Silver believes the league is long overdue for its first female head coach, and he already has a timeline in mind for when he expects it to happen.

“I would be hugely disappointed if certainly in five years we haven’t seen our first female head coach in the NBA,” Silver told Bonnie Bernstein on the NCAA’s podcast channel, per Michael McCarthy of Front Office Sports.

In the 76-year history of the NBA, 15 women have worked as assistant coaches. There are five female assistant coaches currently working in the league today: Jenny Boucek (Indiana Pacers), Lindsey Harding (Sacramento Kings), Sonia Raman (Minnesota Grizzlies), Kristi Toliver (Dallas Mavericks) and Teresa Weatherspoon (New Orleans Pelicans).