Smalling has impressed for United since joining the club from Fulham.
“I don’t look too far ahead but I hope I can really get an established career and stay here for the rest of my life,” he told Inside United.
“I want to get more and more games as my time goes on because I really feel part of this club.
“I’m really enjoying my football at the minute. The manager has full faith in me and I want to repay that in the years to come.”