On 22 September 2015 Poroshenko claimed that "Russia's aggressive actions" proved need for the enlargement of NATO and that the Ukrainian referendum on joining NATO would be held after "every condition for the Ukrainian compliance with NATO membership criteria" was met by "reforming our country".
Den 22. september 2015 hævdede Porosjenko, at "Ruslands aggressive handlinger" beviste nødvendigheden af udvidelsen af NATO, og at den ukrainske folkeafstemning om optagelse i NATO ville blive afholdt, efter at "alle betingelser for ukrainsk opfyldelse NATO kriterierne for medlemskab" var blevet opfyldt "af vort reformerede land".