The Icelandic striker missed Monday night's 3-1 win over QPR due to the terms of his loan deal from the west London club.
Nathan Ellington, who was handed a rare start against Rangers, is likely to find himself on the bench again with Helguson partnering Danny Graham in attack.
Boss Malky Mackay will hand a late fitness check to Henri Lansbury after the on-loan Arsenal midfielder sat out on Monday with a hip injury.
Club captain Jay DeMerit could also return to the starting line-up for the first time since August.
The American defender came on at half-time against Rangers after more than three months out recovering from eye surgery.