Moyes is confident Fellaini is starting to make the impact he did following his club record £15million arrival from Standard Liege 12 months ago.
"I said early in the season that maybe I expected the second season to be difficult for Felli. We've tried to be careful with him. He lost a terrible amount of weight with a bug he picked up in Egypt over the summer.
"But he is now beginning to look a bit more like himself. He's had an influence in games and is beginning to get back into the form we believe he can do."