The Netherlands international was absent from United's 1-0 win over Real Sociedad last night as a precaution.
However, Moyes believes that the prolific forward could return to his partnership with Wayne Rooney on Saturday.
"I hope he will be fit for the weekend," ESPN quotes Moyes as saying. "He has had a couple of niggling injuries even before he went on international duty. They have all just caught up on him a bit so I thought if I had a chance to give him a breather I would do and fortunately for us it worked out fine."
United are currently eighth in the Premier League table on 11 points.