Aberdeen striker Lee Miller misses out as he serves the final game of his three-match suspension.
Midfielder Sone Aluko and defender Zander Diamond are still injured for the visitors.
St Johnstone (from): Smith, Grainger, Irvine, MacKay, Gartland, Morris, Davidson, Millar, Moon, Craig, MacDonald, Morais, Deuchar, Milne, Main, Anderson, May, Durnan, Sheridan, McCaffrey, Jackson.
Aberdeen: tbc
Source: BBC Sport
Source: BBC Sport