Brighton goalkeeper Ben Roberts is to miss their Christmas programme after damaging a knee in training.
Fulham youngster Ross Flitney, who has returned for his second spell on loan, will take his place against Wycombe on Boxing Day, and Swindon on Sunday.
Assistant manager Bob Booker told BBC Southern Counties Radio: "It's a huge blow. He's our number one keeper - but we've got to get on with it.
"Ross may be not that experienced, but you only get that by playing."