The popular Irish International made his long awaited return on Saturday, coming on as a 76th-minute substitute for Robbie Ryan, and has suffered no reaction to his injury. Manager Mark McGhee is unlikely to risk him from the start, however, and he will probably start on the bench.
New signing Abou Fofana and winger Paul Ifill will both have late fitness tests while Alan Dunne and Tony Craig have both been added to the squad in a game which could see The Lions go top if they win.
Meanwhile Stoke City look set to stick with the same side that drew 1-1 with Walsall at the weekend, although Chris Greenacre could make a return to the starting line-up.
Greenacre had started City's opening two League matches, but was dropped to the subs' bench for the match at Walsall.