Kilmarnock are hopeful that Brad Lyons will shake off a knee injury that forced him off in midweek.
Derek McInnes also has some doubts because of a flu bug. Corrie Ndaba (Achilles) and Kyle Magennis (hamstring) remain out.
Motherwell have some unspecified fitness doubts. Lennon Miller went off with a knock in the midweek defeat by Aberdeen. Jon Obika (hamstring) and Pape Souare (ankle) are long-term absentees.