The Scotsman has only missed two games this season and one of those was through suspension so unless he's dragged away by a herd of wild horses I would expect to see Scott Murray in the starting line up tomorrow.
Bristol City also have midfielder Tommy Doherty available after suspension, he was excellent against Cardiff in the first half at Ashton Gate.
One player definately out is Aaron Brown. The defender was sent off along with gareth Ainsworth at Ashton gate and was then sent off again at Chesterfield. He starts a 7 match ban.