The goalkeeper, linked with a pre-contract switch to Ibrox, was replaced for Saturday's 2-0 win over Motherwell by understudy Kyle Letheran and will once more watch on from the stands as his team-mates take on Inverness at the Caledonian Stadium on Wednesday night.
Cillian Sheridan and Rory McKeown have also been ruled out of the Clydesdale Bank Premier League match after they also missed the Motherwell encounter at Rugby Park.
