Oxford United goalkeeper Ryan Clarke has signed a new three-and-a-half year contract with the League Two club.
The 28-year-old, who joined the U's from Northwich Victoria in June 2009 and kept a record-breaking 22 clean sheets in 46 appearances in his first season, will now stay at the Kassam Stadium until the summer of 2014.
United boss Chris Wilder told the club's official website: "Ryan is an excellent goalkeeper who could easily be playing at a higher level. It is vitally important that the football club keeps its best players as we look to progress, and Ryan is without doubt one of the best keepers in this division."
Clarke added: "I've been very happy in my time with Oxford. It's a big club with big ambitions and, as an ambitious player myself, I want to be involved.
"I feel that I've improved since I've been here, thanks largely to the excellent coaching I've received from Alan Hodgkinson, and I think at 28 years old I can still get better, and I'm very happy to do so at Oxford."