St Johnstone midfielder Chris Millar has been ruled out.
Millar has suffered a groin injury and is out for several weeks.
Francisco Sandaza is in the squad but Sam Parkin is still absent after suffering some irritation as he bids to return from a broken leg.
Dunfermline have no fresh concerns.
Defender Kevin Rutkiewicz will miss a return to Perth due to a thigh injury.
Steven Bell (Achilles) and Nicky Phinn (hamstring) remain absent.
St Johnstone (from): Enckelman, MacKay, Wright, Anderson, Callum Davidson, Robertson, Moon, Morris, Murray Davidson, Craig, Haber, Sheridan, May, Mannus, Maybury, Moffat, Sandaza, Steeves
Dunfermline (from): Gallacher, Jason Thomson, Potter, Boyle, McCann, Keddie, Dowie, McDougall, Kirk, Barrowman, Burns, Mason, Hardie, Cardle, Ryan Thomson, Graham, Smith, Buchanan, Clarke, Willis.