Lincoln City have signed goalkeeper Josef Bursik on an emergency loan from Stoke after regular keeper Alex Palmer suffered a head injury in training.
He has already helped Peterborough up from the third tier this month, ending the regular season there on loan.
Lincoln say they have followed concussion protocols with Palmer, 24 who is on loan from West Brom.
Palmer, who had been an ever-present for the Imps in League One this season, said: "Can't tell you how gutted I am. I couldn't wait to play in front of some of you guys [the fans].