Christy Manzinga is available following his red card against St Johnstone last week with his one-game ban applying to league action.
Saturday's postponed league game between the teams allowed some St Mirren players extra time to recover from minor niggles.
Buddies boss Jim Goodwin has an unchanged squad for the trip.
Motherwell provisional squad: Gillespie, Tait, Grimshaw, Carroll, Hartley,
Gallagher, Mugabi, Campbell, Donnelly, O'Hara, Polworth, Hylton, Seedorf, Maciver, Aarons, Watt, Manzinga, Carson.
St Mirren provisional squad: Hladky, Hodson, Famewo, McCarthy, Waters, McGrath, Wallace, McAllister, Foley, Andreu, Djorkaeff, MacPherson, Durmus, Mullen, Morias, Obika, Jakubiak, Chabbi, Henderson, Wallace, Cooke, Lynes.