New St Mirren striker Junior Morias goes straight into Jim Goodwin's squad ahead of the Ladbrokes Premiership clash with Rangers.
The 24-year-old Jamaican has moved north for an undisclosed fee after leaving English fourth tier club Northampton.
Rangers have no new injuries ahead of Sunday's game.
Forward Greg Stewart, who missed the Europa League clash with a calf knock, could also feature.
Provisional St Mirren squad: Hladky, P McGinn, Waters, Baird, MacKenzie, McLoughlin, Magennis, Erhahon, S McGinn, Flynn, Foley, Andreu, Djorkaeff, MacPherson, Durmus, Mullen, McAllister, Morias, Walker, Glover, Kellerman, Breadner, Lyness.
Provisional Rangers squad: McGregor, Tavernier, Flanagan, Polster, Helander, Halliday, Barisic, Edmundson, Goldson, Katic, Jack, Davis, Aribo, Kamara, King, Docherty, Arfield, Ojo, Hastie, Barker, Stewart, Jones, Defoe, Morelos, Foderingham, Firth.