McCoist said: "Kris will be disappointed not to be playing. What pleased me about him coming on against Aberdeen, even more than his goal, was his attitude.
"I had the same problem here. And all you can do is come off the bench and score when you get the opportunity.
"Kris knows, as does Stevie Naismith, Lee McCulloch and DaMarcus Beasley, that they are part of a squad which, hopefully, can win things.
"Kris answered the men who pick the team in the right fashion by coming on and scoring."