The rise of the scary clown trope, fueled by movies like It and real-life pranksters, has left McDonald’s with a bit of an image problem. The fast food chain took its mascot Ronald out of the spotlight following the clown crisis of 2016, but a new promotion from Burger King proves that suppressing the colorful mascot won’t be so easy. As Food & Wine reports, Burger King is offering free Whoppers to customers who come in dressed as scary clowns on Halloween night, an apparent jab at its competitor.

On October 31, from 7 p.m. to closing time, select Burger King locations in Austin, Texas; Salt Lake City, Utah; Boston, Miami, and Los Angeles will hand out free burgers to the first 500 guests who fit the spooky description.

A video advertising the stunt shows a diverse group of creepy clowns, but their ringleader—a familiar-looking red-headed clown dressed in red and yellow—makes it clear that the trolling is intentional.

This isn’t the first time Burger King has used Halloween as an opportunity to poke fun at the golden arches. Last year, a Burger King restaurant in Queens, New York “dressed up” as the ghost of McDonald’s. Customers interested in helping the chain with its latest prank better start planning their costumes now.

[h/t Food & Wine]