On-loan Peterborough striker Izale McLeod could be out for eight weeks with a meniscus problem.
The 25-year-old joined the Championship strugglers from Charlton during the January transfer window and his figured on four occasions to date.
He has missed the Posh's last four games, though, and now looks set for a lengthy stint on the sidelines.
Manager Jim Gannon admits it is a blow to lose McLeod so soon after welcoming him to the club.
"Izale has been diagnosed with a meniscus problem so he's looking like he might have to sit out for four to six, maybe even eight, weeks with that, so he's a loss, because I think in the formation we have he would have done well for us," he told the club's official website.
Gannon will, however, welcome the return of defender Gaby Zakuani as he bids to lift his side off the foot of the table.
The 23-year-old returned to training this week following a groin injury which has kept him out since Boxing Day.
"Gaby trained today (Friday)," said Gannon. "It's going to take him a while to get back up to speed and get used to bodies around him but it was great to have him on the training pitch joining in with us."