The Scotland international has not featured for United since the middle of December because of a chronic inflammatory bowel condition.
However, he was unexpectedly named among the United substitutes for this evening's pre-season friendly against Aberdeen.
"It's been quiet progress for the boy," Ferguson told MUTV. "He joined in training a couple of weeks ago and it's one of those situations where you say 'Let's see how he does' because he has had a really difficult time in the last year. Therefore, I wasn't really placing too much hope in it but let's see how he does.
"He's got to the stage now where he feels he needs a game. I let him join Scotland this week but he wanted a game so I said: 'Come to Aberdeen and join up afterwards'. I'll give him 20-25 minutes."
The 28-year-old joined the Red Devils as a trainee in 1995.