The Blues' longest-serving player has made 289 appearances since joining from Ipswich in 2003 and the new deal entitles the fans' favourite to a testimonial as reward for his loyalty.
The 29-year-old had suffered a frustrating season because of injury but he is targeting a pre-season return.
"Nine-and-a-half years is quite a big chunk of your life to spend at one club so I'm delighted to be offered the opportunity to extend that for another year," he told Chairboys Player.
"I'm proud and honoured to have been able to have spent 10 years at one place, it's a big deal and to have spent it here is an even bigger deal.
"Some of the names that have achieved that and had a testimonial here over the years are big names within the club's history and I'm really proud and honoured to go into my testimonial year.
"I've been in the gym nearly every day and I'm working as hard as I possibly can to get fit as soon as I can."