Olympic gold medalist Caitlyn Jenner — who came out publicly as transgender in 2015 — has been an outspoken critic of transgender women competing in women’s sports, and has called on the NCAA to change its rules when it comes to transgender athletes.

“Biological boys, I’ve said from the beginning, should not be playing in women’s sports,” Jenner said in a Fox News appearance on Wednesday. “We need to protect women’s sports. Obviously, this is about Lia Thomas, who has brought a lot of attention to this issue.”