Ukrainian President Petro Poroshenko has said U.S. President Donald Trump adheres to the stance on the illegal annexation of Ukraine's Crimea by the Russian Federation.

"It is very good that President Trump did not back water on Ukraine... For example, whose Crimea is," Poroshenko told a Svoboda Slova [Freedom of Speech] talk show on Ukraine's ICTV channel, commenting on a recent summit of the U.S. and Russian presidents, DW's Ukrainian Service has reported.

Read alsoTrump considers annexation of Crimea illegal, Putin says

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As UNIAN reported earlier, Trump never mentioned Ukraine during a joint press conference with Putin in Helsinki following eye-to-eye talks between the two leaders.

At the same time, Putin twice mentioned Ukraine.

The first time was when he said that the presidents had discussed the situation in Donbas. The Russian leader said: "We paid special attention to the bona fide implementation of Minsk accords by Kyiv.

At the same time, the U.S. could be more decisive in nudging the Ukrainian leadership, encouraging them to work actively to this end."

The second time was when Putin said Russia was ready to continue gas transit via Ukraine in case a gas dispute in the Stockholm Arbitration Court is resolved.