Turkey’s President Recep Tayyip Erdoğan today signed into law Sweden’s accession to NATO.

“Welcome Türkiye’s approval of the ratification of Sweden’s NATO accession,” Swedish Prime Minister Ulf Kristersson tweeted. “With this, a key milestone has been reached in Sweden’s path towards NATO membership.”

All NATO members, except Hungary, have ratified Sweden’s application to join the military alliance, prompted by Russia’s war of aggression against Ukraine.

Shortly before Erdoğan’s move, U.S. Ambassador to Ankara Jeff Flake said he expected the rapid sale of F-16 fighter jets to Turkey.