The midfielder has penned new terms to 2019.
"I'm 26 and I've got a lot ahead of me here at Barça. I hope the injuries treat me well and with my work and the team's work I hope we can keep the same dynamic we've had since I've played in the first team," the midfielder said.
"The most important thing is to feel at home. For me that's vital and I'm happy; it's my lifelong club."