Walker, who has missed the last eight matches due to ankle ligament damage, was poised to return last week but succumbed to illness.
Laws must also decide whether to stick with Niall Canavan in central defence or recall David Mirfin, who returned to the substitutes' bench for the recent win at Colchester having missed the previous 10 games due to a knee injury.
Fellow defender Christian Ribeiro and midfielder Damien Mozika, who both remain sidelined with respective hamstring injuries, are hoping to return to contention in the next couple of weeks.
Scunthorpe, who have won one and drawn three of their last four league games, will be looking to avoid defeat in their bid to climb out of the relegation zone.
- Sports & Recreation
- David Mirfin
- Damien Mozika
- Christian Ribeiro