The new deal will keep the 28-year-old at St Mary’s until at least the summer of 2015.
He told BBC Radio Solent: “I love being at the club, and have loved every minute of the last two years.”
He added: “I knew I was in my last year, so I wanted to come back fit and raring to go, and that competition for places was going to be hard.
“I’m very grateful to the club for offering me the new contract, and it’s nice to have that security moving forward.
“The ambition that we have is there for all to see. We’ve started the season brilliantly and are top of the table, so why would you want to be at any other club?”
