Wycombe have signed Tottenham defender Adam Smith and free agent Danny Spiller.
The Chairboys have signed 18-year-old Smith on loan until September 5 while Spiller arrives on non-contract terms until the same date, with both available to face Charlton at the weekend.
Wycombe boss Peter Taylor told the club's official website: "We've got injuries to both our right-backs and instead of continuing to play a centre-back there I decided to get another full-back in.
"That doesn't mean Adam will play at Charlton, but I am pleased to have an energetic right-back on board.
"I've known Danny for a long time. I explained to him that we've got a lot of midfielders in the building already but he wanted to come with us for a month on no pay. That shows a great attitude."