Mavuba said that his decision might be made for him should the club not opt to bring in new players to play alongside the young squad at Lille.
"Either I commit myself for the long-term, or I say 'bye-bye'," he told L'Equipe
"I have had talks with the officials and they have told me they want to keep the same group together.
"It is impossible to play a whole season with only young players, even if they are good."
Lille are currently fifth in Ligue 1.