The former Everton manager admitted recently that the player has yet to adjust to the demands of playing for United having spent his career so date in the Championship with Palace.
"Wilf has not appeared," Moyes said. "We have not felt we have had the opportunity.
"I want Wilf to get used to what happens here. The competition is hard. It is just impossible to get all these players a game at the one time. You can only ever play eleven.
"But it is important Wilf gets to see the level of the training here, the level of the players and the quality they have got. He is getting better, which we are pleased about."
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