The US economy grew at a much slower rate from October to December than originally predicted, the US Commerce Department said.
US gross domestic product (GDP) grew at an annualised rate of 2.4% in the fourth quarter of 2013, down from an initial estimate of 3.2%.
The revision is down to weaker than expected consumer spending.
Severe winter weather in the US is expected to slow growth further in the current quarter.
The Commerce Department initially predicted consumer spending had expanded by 3.3%, but spending is now estimated to have grown at a 2.6% annual rate.
Consumer spending accounts for roughly 70% of US economic activity.
Bad winter weather has cut into vehicle sales, among other purchases.
Despite the revised GDP estimate, US growth should be regarded as strong, the financial information firm Markit said.
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