A federal bankruptcy judge has rejected a $2.4 million fee enhancement requested by two law firms and a financial adviser in the bankruptcy of Fisker Automotive, a maker of plug-in hybrid electric cars.

The enhancement, which would have raised compensation for the professional services firms by more than 53 percent, was turned down by U.S. Bankruptcy Judge Kevin Gross of the District of Delaware, who said that tight deadlines and complexity of the work would not have been unexpected.