Denmark’s Prime Minister on Wednesday told Donald Trump that it was up to Greenland to decide on its future, following the US President-elect’s provocative remarks about seizing the island.

Greenland must make its own decisions about independence from Denmark, Prime Minister Mette Frederiksen told President-elect Trump in a Wednesday phone call. The big picture: Trump, since his first term, has repeatedly floated the idea of the U.S. buying Greenland even though the island's leaders have said it is not for sale.

The U.S. ally is signaling its willingness to negotiate military and economic matters related to the island but not to sell it.