The November producer price index fell 0.8% and the core rate rose 0.1%, the Labor Department reported Thursday.
The October numbers were unrevised from the originally reported 0.2% slip in the headline number and a 0.2% fall in the core rate.
Economists polled by Thomson Reuters expected a 0.5% rise in the headline number and a 0.2% core increase.
Food prices rose 1.3% in the month, while energy prices fell 4.6%.
Intermediate goods dropped 1.2%, while core intermediate goods prices were off 0.1%.