Ratification of Sweden’s NATO membership by Turkey’s parliament hinges on the U.S. Congress’ approval of Turkey’s request to purchase F-16 fighter jets, Turkish President Recep Tayyip Erdogan has said, calling on the two legislatures to act “simultaneously.”

In comments reported on Tuesday, Erdogan also said Canada and other NATO allies must lift arms embargoes imposed on Turkey. “Positive developments from the United States regarding the F-16 issue and Canada keeping its promises will accelerate our parliament’s positive view on (Sweden’s membership,)” Erdogan said. “All of these are linked.”

He made the comments late Monday while returning from a visit to Hungary. Hungary and Turkey are the only two NATO members not to have formally approved Sweden’s bid to join the trans-Atlantic military alliance. Erdogan’s comments were reported by the state-run Anadolu Agency. He told reporters that Turkish Foreign Minister Hakan Fidan has raised the issue of a simultaneous approval by Turkey’s parliament and Congress during discussions this week with U.S. Secretary of State Antony Blinken. “If we operate this simultaneously, we will have the opportunity to pass this through the parliament much more easily,” Erdogan quoted Fidan as telling Blinken.

Erdogan submitted a protocol on Sweden’s admission to parliament in October, but the ratification process has stalled.

The Turkish leader has since linked the matter to Congress’ approving Turkey’s request to purchase 40 F-16 fighter jets and kits to modernize its existing fleet.