Leicester defender Patrick Kisnorbo has had his red card rescinded by ref Phil Joslin following the defeat at Ipswich.
Kisnorbo conceded the penalty which gave Ipswich the lead
Kisnorbo was sent off on the advice of a linesman and a penalty was awarded as Alan Lee stepped up to make it 2-1.
But replays showed Kisnorbo won the ball and that his tackle was outside the box. And Foxes boss Ian Holloway said: "It wasn't a penalty.
"The ref was overruled by his linesman and that's like me picking a team and then being overruled by my assistant."
Holloway added: "It was outside the box and he played the ball. Patrick wasn't the last man so shouldn't have been sent off.
"I thought it at the time and I've had it confirmed on a replay."
Foxes midfielder Stephen Clemence was also furious with the decision which allowed Lee to score the penalty following the Australian's 39th-minute dismissal.
He told BBC Radio Leicester: "When the tackle came in, I can see Skip (Kisnorbo) has got the ball.
"The referee was going to give a corner but because the linesman gave a penalty, all of a sudden, the ref thinks it's a sending off.
"It's a shocking decision and it hurt us badly. I think with 11 men, we would have given them a very good game."