They should also correct a mystifying Monday selection from the win at Port Vale earlier this week.
Charlton have won their last three third tier matches under former Posh skipper Dean Holden.
Posh started impressively under Darren Ferguson at Vale, but the Londoners are sure to present a tougher test.
The PT has stuck with the same 4-2-3-1 formation used at Vale Park.
5. RONNIE EDWARDS
The youngster's left foot looked much improved last time out. That alone keeps him in the side, but his quality on the ball also helps. Photo: Joe Dent
6. HECTOR KYPRIANOU
The midfielder (pictured on the left of the goal celebration) was a surprise pick by Ferguson on Monday, but there did seem to be a greater desire to move the ball at a quicker tempo and so Kyprianou becomes a better bet than Jeando Fuchs. I see no reason to make a midfield change. Photo: Joe Dent
7. JACK TAYLOR
Of all the players to be inherited by the new boss I expect Taylor to flourish the most. He will benefit from midfield partner Kyrpianou's give and go style. Photo: Joe Dent
8. JOE WARD
Ward got better as the game wore on at Vale Park. Let's hope he plays that way for 90 minutes on Saturday. Photo: Joe Dent