David Bates claims visiting sides "don't get the big calls at Ibrox" after an apparent foul wasn't given in the build up to Rangers ' goal on Saturday.
Aberdeen looked like leaving Govan with a well-earned point, but Kemar Roofe broke the deadlock with less than ten minutes to go as the hosts kept on Celtic's coat tails in the title race.
But Bates believes Calvin Bassey fouled Calvin Ramsay shortly before Roofe found the net, although urged the Dons not to dwell on the decision.
