The England international missed Albion's 2-2 draw with Manchester United on Monday night through injury, but he is fit enough to reclaim his place against the Eagles.
Foster's inclusion is the sole change made by head coach Alan Irvine as the West Midlands club look to continue their good form in the Premier League.
West Bromwich Albion: Foster; Wisdom, Dawson, Lescott, Pocognoli; Brunt, Gardner, Dorrans, Morrison; Sessegnon; Berahino
Subs: Myhill, Gamboa, McAuley, Mulumbu, Blanco, Anichebe, Ideye
Crystal Palace: Speroni; Ward, Mariappa, Hangeland, Kelly; Jedinak, Ledley, Zaha, Bolasie; Chamakh, Campbell
Subs: Hennessey, Fryers, Guedioura, Bannan,Puncheon, Doyle, Gayle
You can keep updated with this match by following Sports Mole's live text commentary.