St Mirren keeper Craig Samson insists he will not be dwelling on Saturday's mistake against Hibernian.
Samson was caught in possession by Leigh Griffiths over the weekend, leading to Hibs opening the scoring in a 3-2 win.
The 27-year-old accepts that keepers will be criticised for making mistakes and he knows it will not be the last in his career.
Samson has a chance to atone for the blunder against Ayr in the League Cup and he is keen to help his team-mates reach Hampden Park.
"As a keeper you make mistakes and it often results in a goal," admitted Samson.
"That's life as a goalkeeper and I would not change anything about it. You just have to take it on the chin and get on with things.
"If you make a mistake as big as the one I made against Hibs on Saturday, nobody needs to tell you what you have done. In fact, that's the last thing you want to hear.
"Other players can make mistakes and they don't get highlighted or mentioned.
"It's not the first or last mistake I will make. We got ourselves back into the game by going 2-1 ahead so ultimately it wasn't my error that cost us the game.
"I am over the Hibs match already and I do not see the Ayr United game as the chance to make amends for that mistake just because it is my old club.
"Saturday has gone and it's forgotten. This game is massive as it is a quarter-final of a national trophy and everybody wants to get to semi-finals and finals at Hampden Park."