Mihály Varga, state secretary of the Prime Minister’s Office, on Friday said he would propose inserting a clause into Hungary’s new constitution making the forint the official currency of the country.

“If Hungary adopts the euro, then the text of the constitution will have to be changed,” Varga said.

Changing the constitution requires the votes of two-thirds of MPs.

Prime Minister Viktor Orbán said earlier that Hungary’s eurozone entry is “unimaginable” before 2020.