Sales of new U.S. homes accelerated strongly in December, a sign that home-buying may improve this year after a lackluster 2014.

The Commerce Department said Tuesday that new home sales climbed 11.6 percent last month to a seasonally adjusted annual rate of 481,000. The gains were not enough to offset essentially flat home-buying over the course of 2014. Just 435,000 new homes were bought last year, a modest 1.2 percent improvement from 2013.