KYIV, Ukraine (AFP) — Ukrainian President Volodymyr Zelensky on Friday said United States President Donald Trump told him he would allow Ukraine to produce advanced Patriot air defense missiles, after a series of reversals on the issue.

Kyiv is facing a shortage of the missiles, which remain the only ones reliably able to counter the ballistic missiles that Russia launches at Ukraine.

“At our last meeting, President Trump emphasized to me that yes, I have made a final decision. Ukraine will receive licenses for the production of Patriot missiles,” Zelensky said in a voice note to journalists.

In July, Trump said it would be “pretty cool” to grant Ukraine the licenses, before backtracking, saying the US should be “very careful” before granting Ukraine authorization.

Ukraine has reported an acute shortage of Patriot interceptors since the US and Israel went to war with Iran in February, diverting supplies of the advanced systems.

Even if the licenses are granted, establishing industrial capacity would require more than a year and would not meet Kyiv’s immediate needs.

And Kyiv has renewed calls for urgent support ahead of winter, and the threat of a repeated campaign of Russian strikes against Ukraine’s power and heating infrastructure.

Kyiv needs five percent of the United States’ Patriot interceptor missiles to get through the winter and 10 percent to destroy all of Russia’s ballistic projectiles, Zelensky said last month.

In parallel, he said Kyiv is working on its own anti-ballistic systems, Freya.