Leicester City's Stephen Hughes had been putting off an ankle operation to make sure The Foxes retained their Championship status for next season.
Manager Rob Kelly admitted the seriousness of the Scot's injury, which has been a problem since his £1 million arrival from Rangers in January.
And Kelly described the depth of the injury problems in the squad.
"Stephen Hughes has put off an ankle operation," he confirmed. "And Rab Douglas has been carrying a shoulder injury.
"Everyone else is carrying bumps and bruises too.
"But we've got this fighting spirit in the dressing room, a real unity," he said.
The Walkers Stadium will see Championship football again next season, following Crewe Alexandra, Brighton & Hove Albion and Millwall's relegation from the league.
The Foxes are currently 17th in the table, on 51 points, and face Plymouth Argyle, at home, on Saturday.