Fabregas has been linked with a move back to the Premier League with Manchester United in recent weeks, with Barca rejecting a pair of bids for the midfielder last month.
Wenger told Arsenal's official website: "I haven't heard that comment [that it is reportedly up to Fabregas if he leaves Barcelona].
"I haven't read it so I'm always a bit cautious to answer what a manager is supposed to have said. I don't know.
"What I know is that Fabregas will stay one more year at least in Barcelona, that's the information I have. If that changes, I don't know, but I have been told that."