WICHITA, Kan. (AP) — A former Wichita high school music teacher has pleaded guilty to attempted unlawful sexual relations with a student.

The Wichita Eagle reports that Alan Martens entered his plea Monday. He had been charged with two counts of unlawful sexual relations. Dan Dillon, spokesman for the Sedgwick County District Attorney’s Office, said that one of the charges was amended as part of a plea agreement and the other charge was dismissed.

Prosecutors say Martens exchanged text messages that were sexual in nature with a female student at Wichita Heights High School. It’s illegal in Kansas for teachers to have sexual relationships with students, even if the student is old enough to give legal consent. The age of consent in Kansas is 16. Court records say the student was at least 16.

Martens’ sentencing hearing is scheduled for April.