Burger King, known for its flame grilling, has taken exception to a bit of random geographical trivia—that a remote volcanic island in the southern Indian Ocean is named McDonald Island.

BK in Brazil, convinced that fiery volcanic activity shouldn’t be associated with its main rival, has launched a tongue-in-cheek campaign to right this wrong. 

As seen in the video below, it’s encouraging people to visit McDonald Island on Google Maps—its full name is actually Heard Island and McDonald Islands—and leave the simple hashtag comment #IlhaWhopper (#WhopperIsland). Those who do so will find coupons for a Whopper discount.

There’s a charming silliness to the whole idea, and the video is amusing too—telling the story of a BK drone delivery to the island’s caretakers. The arch tone of the voiceover is also well done.

“If anyone deserves a hot, fire-grilled burger, it’s this team that takes such good care of our volcanoes,” said Juliana Cury, CMO of Burger King Brazil.

The campaign includes the posters below.