Josh McQuoid is set to return to the Millwall squad after shaking off a groin problem.
He will vie with John Marquis and Leicester loanee Dany N'Guessan to partner Darius Henderson in attack, the latter having scored in both his appearances since joining the Lions from Sheffield United.
Therry Racon and Shaun Batt are therefore the only injury absentees for Kenny Jackett.
Midfielder Racon, the summer signing from Charlton, is out for a month with a hamstring injury and striker Batt's recovery from cruciate ligament damage has been disrupted by a calf strain.
Gabriel Zakuani remains a doubt for Peterborough.
Darren Ferguson has now clarified the 25-year-old's injury situation, after his absence from Sunday's defeat to Blackpool sparked rumours of a potential transfer.
Ferguson told BBC Radio Cambridgeshire: "He's got a problem with his toe he did early against Stevenage [last week].
"He was never going to be fit for the game but we managed to keep it quiet, we'll see how he is for Millwall."
New signing Josh Thompson was an unused substitute in the defeat at Bloomfield Road on Sunday and the young defender, on a season-long loan from Celtic, will be pushing for a place in the starting eleven on Wednesday.