Ferdinand missed Carling Cup final with a back injury and is out of the midweek international against Egypt at Wembley.
But the United centre-back insists he will be back in time for Saturday's Premier League clash at Wolves.
Ferdinand, 31, said: "I'm all right. I've been training this week. Obviously I haven't played any games to be fit enough to play for England.
"This latest problem has only been a minor setback. It's just been precautionary, me not playing, to make sure it doesn't get any worse.
"But I'm fine now - no pain, no problems, nothing, so I'm cool.
"It was decided it was best for me to stay in Manchester and train, rather than with England.
"I'll be fit to play against Wolves at the weekend - if selected."