Leyton Orient boss Russell Slade will be forced into at least one change.
Defender Tony Craig has been recalled from his loan spell by Millwall so utility man Leon McSweeney, who missed the 3-0 defeat by MK Dons on Boxing Day through suspension, is likely to step in at left-back.
On-loan Tottenham goalkeeper David Button, who has been out for almost four months with a shoulder injury, was on the bench against the Dons and is now pushing Lee Butcher for his place.
Regular number one Jamie Jones is also close to returning from his shoulder problem but will not be risked just yet.
Midfielder Dean Cox is still out with a knee injury.
Meanwhile, Charlton skipper Johnnie Jackson could return from injury.
The left-sided midfielder has been out since mid-November with a hamstring problem but is back in training and has been pencilled in for a comeback either against the Os or Brentford on January 2.
Winger Danny Green will be missing from the opposite flank through suspension after he was booked for the fifth time this season against Yeovil on Boxing Day.
Scott Wagstaff would be his natural replacement but he needs a late check on the foot injury which sidelined him at Huish Park.
Dale Stephens is still out with an ankle problem but fellow midfielder Bradley Pritchard could return to the bench after he missed out on Monday.