Polish Prime Minister Beata Szydło | Vladimir Simicek/AFP via Getty Images Beata Szydło: Poland may drop Rome declaration Poland prepared to walk away if its priorities aren’t included, PM said.

Warsaw won't adopt the Rome declaration, which will lay out a vision for the future of the EU after Brexit, if it doesn't like it, said Poland's Prime Minister Beata Szydło, Reuters reported Thursday.

"If the declaration does not include the issues which are priorities for Poland, we will not accept the declaration," Szydło told broadcaster TVN. "The unity of the EU, defense of a tight NATO cooperation, strengthening the role of national governments and the rules of the common market which cannot divide but unite — these are the four priorities which have to be included in the declaration."

Earlier this week Szydło said Poland will firmly defend its stance at the gathering of European Union leaders in Rome on Saturday, and would oppose the idea of a multi-speed Europe.

EU leaders are due to sign the Rome declaration at the summit, held to mark the 60th anniversary of the bloc's founding Treaty of Rome.