Darren Pratley will miss the remainder of the season after aggravating a shoulder injury in the recent home game Watford.
The midfielder was substituted in the first half after landing awkwardly.
And scans and further assessments have revealed damage to a screw from a previous operation from his time as a player at Swansea.
“We’ll be missing Darren for the remainder of the season,” Dougie Freedman confirmed. “It’s a blow, but it’s also an opportunity for someone to come in and play.”