The 31-year-old has not played a first-team match for the Robins since he damaged his medial ligaments in the 2-2 draw with Coventry two months ago, but could make his return against the O's.
Midfielder Tommy Miller replaced Simon Ferry in the second half of Friday's 5-0 victory over Tranmere to make his second appearance since returning to first-team action, having missed the whole of November through injury. He is expected to play some part again.
Jay McEveley's knee surgery means he misses out once more, with Joe Devera set to deputise again while striker Paul Benson is still on loan at Portsmouth, having recently extended his deal for a further month.
