Nas and Kelis (Lawrence Lucier/Getty Images)

Nas wants to be able to spend more time with his son, and now he’s taking ex-wife Kelis to court for an official visitation schedule.

According to documents obtained by Blast, Nas states that he has “work[ed] cooperatively with Kelis over the years,” but that Kelis only “allows him to exercise his custody with their son when she deems it convenient for her.”

Nas and Kelis were married in 2005 but divorced in 2010, and documents state that Nas doesn’t see his son for months at a time. Nas has proposed a schedule for his visitation to happen on the first, third and fifth weekend of every month, on Father’s Day and each other’s birthday.