The larger stake would give Inalum a controlling stake in Freeport's Indonesian assets, including the Grasberg mine, the world's second-biggest copper mine.

Widodo said the government hopes to get larger amount of income from tax revenue and royalties under the deal and that Indonesia's national interest should be prioritised in the agreement.

Coordinating Minister for Economic Affairs Darmin Nasution told Reuters the prices for the shares to be purchased under the deal have not been determined yet.

(Reporting by Gayatri Suroyo; Writing by Fransiska Nangoy; Editing by Christian Schmollinger)