Anton Walkes comes into the Pompey side to face Burton this evening.
He replaces Nathan Thompson – whose wife has just given birth to a baby boy – in the only change from the side that beat Fleetwood at the weekend.
David Wheeler is fit enough to be named among the substitutes after recovering from an ankle injury.
Pompey: MacGillivray; Walkes, Whatmough, Clarke, Brown; Naylor (c), Donohue; Lowe, B.Thompson, Curtis; Hawkins
Subs: McGee, Burgess, Close, Evans, Wheeler, Pitman, Mason