Charlton defender Johnnie Jackson has ended his loan spell at the club and returned to Notts County because of injury.
Addicks boss Phil Parkinson had hoped to extend the defender's loan at the Valley until the end of the season but a hamstring injury has curtailed that.
He told News Shopper: "Johnnie Jackson is out for six weeks. His loan was up on Saturday anyway but unfortunately his injury was a bit worse than we first feared.
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We've got a few options within the squad, so we will probably go with what we've got.
"Kelly Youga is back in training and has put himself up to be available.
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We will assess everybody tomorrow in training."