Dundee United manager Micky Mellon insisted the refereeing team put in a disappointing Scottish Cup performance at Hampden.
His Terrors side fell 2-0 to Jack Ross' excellent Hibs who are now chasing a second Cup triumph in five years.
But Hibees striker Christian Doidge was clearly offside in the build-up to a crucial second goal for the Easter Road men.
Mellon insists it shouldn't be used as an excuse for the defeat but bemoaned referee Bobby Madden and his assistants for getting such a big call wrong.
The boss told Premier Sports: "They're big moments aren't they?
"I thought there were a lot of moments today. But you've got to be careful what you say.
"It looks like I'm speaking about that rather than Hibs beating us 2-0.
"But I think that was a disappointing performance.
"In a moment like that, you really need to get that right."
Dundee United weren't short of chances but lacked a clinical edge while their opponents looked convincing.
Mellon said: "They're hugely disappointed. We will learn from today, we'll get better at what it takes to come to these games and stamp your personality on it.
"Every credit to Hibs, I think they deserved it. When the moments came to us we didn't show the quality that's needed on these days, that you need to try and get a positive result."