Olympus OM10 shutter fires self when film is advanced.

Hi guys, I'm getting back into film photography and I'm having a bit of trouble with the camera i just purchased. It's an olympus OM10. When I try to advance the film, about half the time it fires the shutter. It only does it with film in the camera. Do you guys have any idea of how to fix this thing? Here is a video of the problem. [video=youtube;21s2mogm2EM]https://www.youtube.com/watch?v=21s2mogm2EM[/video] As you can see, when it happens, the mirror starts to lift as I advance the lever. I'd appreciate any help.

EDIT: I just realized there is a repair forum, OOPS!