Germany has approved Poland’s request to export five old MiG-29 fighter jets to boost the Ukrainian air force’s capabilities in the fight against Russia, Berlin announced today.

The Polish Ministry of Defense has not yet commented on the decision.

German Defense Minister Boris Pistorius he said that the request arrived today and that its approval on the same day by Berlin proves Germany’s credibility.

Germany inherited 24 Soviet-made MiG-29 fighters from the German Democratic Republic upon reunification in 1990. At the time the MiGs were considered among the most advanced fighter aircraft in the world.

In 2004, Berlin gave 22 of these aircraft to Poland. Of the remaining two, one crashed and was destroyed and the second is on display in a museum.

Poland needed Berlin’s approval to send the remaining MiG-29s to a third country.

Last week, during a visit to Warsaw, Ukrainian President Volodymyr Zelensky said Poland could help form a coalition of Western powers that would supply Kiev with warplanes. Ukraine, which hopes to launch a counterattack within the next weeks or months, wants to secure fighter jets to defend its airspace.

Until now, Western countries have been reluctant to send advanced aircraft, such as F-16s, to Kiev, but some are sending the old MiG-29s already in use by Ukrainian forces.