Smalley was absent as the league leaders halted a five-match winless run with victory over Lincoln on Saturday.
But he comes back into the reckoning to partner leading scorer Craig Davies in attack.
Simon Ford is a doubt after he was forced off with a knock at Sincil Bank. Danny Whitaker replaced him against the Imps and the midfielder could fill in at centre-half, as he has several times this season, if Ford is unavailable.
Boss John Sheridan hopes to have on-loan defender Javan Vidal (virus) and midfielders Mark Allott (ankle) and Dwayne Mattis (calf) available after they missed out at the weekend.
Source: PA
