Instead he will head to Elland Road to rejoin his parent club, who are just four points above the relegation zone in the Coca-Cola Championship and face a second successive relegation battle.
He will be named on the bench for Leeds tomorrow night for the Carling Cup third round tie with Portsmouth.
In 12 appearances for United he scored twice, after joining on the eve of the season following an injury to first-choice striker Steve Torpey.