Egyptian President Abdel Fattah al-Sisi said on Sunday he would meet Ethiopian Prime Minister Abiy Ahmed in Russia to discuss a dispute over a hydropower dam that the Horn of Africa country is building on the River Nile.

A long-running diplomatic standoff over building and operating the Grand Ethiopian Renaissance Dam has heightened tensions between the two countries. Egypt worries that the dam will threaten its already scarce water supplies.

“I agreed with the Ethiopian prime minister to meet in Moscow and to discuss the issue to move forward, and God willing, things will go in a way that helps to solve this issue in one way or another,” Sisi said at a military forum on Sunday.

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