WASHINGTON — U.S. employers added 155,000 jobs in December, a steady gain that shows hiring held up during tense fiscal cliff negotiations in Washington.

The Labor Department says the unemployment rate stayed at 7.8 percent last month. November's rate was revised higher from an initially reported 7.7 percent.

Robust hiring in manufacturing and construction fueled the gains. Construction added 30,000 jobs, the most in 15 months. That likely reflects additional hiring needed to rebuild after Superstorm Sandy and also solid gains in home building that have contributed to a housing recovery.