Turkey will start receiving its order of Russian S-400 air defense systems in July, according to the Turkish president, Anadolu Agency reports.

“We will hopefully start receiving the S-400 air defense systems which we ordered next month,” Recep Tayyip Erdogan told his ruling Justice and Development (AK) Party’s parliamentary group. Erdogan said the S-400 issue is directly related to Turkey’s sovereignty rights.

“We will not take a step back from this,” he added.

Turning to last Sunday’s re-run Istanbul election, Erdogan said “there is no offense at the nation or blaming the nation” over the poll, which saw an opposition candidate win the mayor’s seat.

The election was a do-over from the March 31 local elections, ordered in Istanbul after election authorities ruled the polls suffered from irregularities and illegalities.