The Swiss government is open to revising its offer to the United States in response to planned heavy tariffs, Business Minister Guy Parmelin said, as experts warned the 39% import duties announced by President Donald Trump could trigger a recession in Switzerland.

Switzerland was looking at a 31% tariff rate for its exports to the U.S. That’s now 39% barring a further deal, and some are reeling.

A 39% tariff on Swiss goods is a blow for a country that hoped to reach an early trade deal with the Trump administration. The rate, due to take effect on Thursday, exceeds the 31% level floated in April.