Town have confirmed that John McGreal will be out of action until the early part of next year after damaging knee ligaments during Tuesday night's 1-1 draw at Brighton.
The central defender was replaced after nine minutes and appeared to be in some pain.
With Chris Makin and Mak Venus also on the sidelines at present and Wayne Brown negotiating a move to Watford, it looks as though Matt Holland will continue in the central defensive role he has slipped into of late.