Wycombe Wanderers midfielder Max Kretzschmar has put pen to paper on a two-and-a-half year deal with the Chairboys.
The 20-year-old has made 26 appearances for the Sky Bet League Two side this campaign, scoring three goals.
He told the club's official website: "I'm delighted. I joined at 14 and I've grown up with Wycombe Wanderers which has been a big part of my life.
"As a young player, it's important to get games under your belt. The best thing for my development is to stay here and keep giving my all for Wycombe."
Wanderers boss Gareth Ainsworth added: "Max was always going to be a patient one. His physicality was behind the other lads a little, but you look at the modern game now and you don't have to be a big brute.
"He's got great technique and he's come on and scored goals for us this season - I think he's surpassed any dreams he had at the start of the season.
"I'm really, really pleased for him. A youngster of his ability is going to start attracting interest so I wanted to tie him up and Max is definitely one for the future here. His attitude is spot on too."
Meanwhile Junior Morias and Lee Angol have joined non-league side Boreham Wood on short-term loan deal.