Motherwell's Brian McLean has accused Pedro Mendes of diving to win the penalty in Rangers' 3-1 win at Ibrox.
Mendes went down in the box under a challenge from McLean to allow Kris Boyd to score from the spot and secure victory for Rangers.
The decision from referee David Somers infuriated the Motherwell players with goalkeeper Graeme Smith picking up a booking for his protests.
McLean was not happy with the antics of Mendes feeling the Portuguese midfielder played for the penalty.
"There were a few of us not happy with the decision because it was a wee bit of simulation by Mendes. But it's Ibrox and you are always up against it," said McLean.
"I felt as if I got the ball. My leg was dangling there but he was already heading towards the floor before I stuck my foot out.
"It's one of these things and sometimes you need to take it on the chin and get on with it.
"It's unfortunate that the penalty was given as we were still in the game when we were 2-1 behind. We only needed one lapse from them."