The 33-year old centre-half is set to make his 400th appearance for the club when they host Wigan Athletic today and says he is determined to remain at Old Trafford and make up for the high number of games he has missed due to injury.
"However long the manager wants me here, and my body can take it, I want to stay at this club," he told The Sun.
"From the day I signed I always said that when I leave United I want to be able to walk out with my head held high and my chest puffed out knowing I did a good job.
"But I can't say that yet because the job isn't finished. It is still a work in progress.
"I'm proud of playing 400 times for this great club although part of me thinks it could have been 500 if I hadn't had those injuries over the last couple of seasons.
"That's another good reason for keeping going to make up for lost time. I feel good now. I'm over the injuries and enjoying my football as much as ever."