A man who set up a video camera in his workplace's bathroom to film a female co-worker pleaded guilty to voyeurism Thursday.

Steven Frame, 53, admitted to setting up the camera at Tucson Jet Center, a private company near the airport, to film his co-worker for sexual gratification on Dec. 27, 2012.

A female employee found the camera taped to the door-closure mechanism after using the bathroom and notified airport police.

Frame told police that he mounted another camera under the toilet, according to police documents.

Frame faces between four months and two years in prison or up to a lifetime of probation when he is sentenced June 17 by Pima County Superior Court Judge Christopher Browning.