United tabled a new two-year deal for the Belgium worldwide in September but despite Jose Mourinho making it clear he remains a vital member of his squad, Fellaini wants to move on.
That's according to the Daily Star, who claim the Belgium global is unsatisfied with the new contract he's been offered at Old Trafford.
And when he was linked with a move to Galatasaray in the summer, United manager Jose Mourinho said the Turkish club had more chance of signing him than Fellaini.
United have not given up hope that he will agree new terms, but sources told ESPN FC they were prepared to risk losing him for nothing rather than pushing for a fee in January.
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Last December, sections of United fans booed the midfielder in their first match back at Old Trafford after he clumsily gave away a penalty which allowed former club Everton to snatch a late draw.
Jose Mourinho is keen not to lose Fellaini in January.
United have no intention of selling in the winter window leaving Fellaini with the choice of signing a fresh deal now or running down his contact and leaving for nothing at the end of the season.