Burger King is taking aim at McDonald’s with the new changes in its mobile app rolled out on Dec. 4.

There’s a new feature in the app called the Whopper Detour, which allows consumers to order a Whopper for just one cent. The caveat? You have to be within 600 feet of a McDonald’s. When you activate the coupon, the app will then reroute you to the nearest Burger King. Kind of genius, really.

Related: Burger King Giving Away FREE Whopper-Flavored Dog Bones

The Whopper Detour will be in effect until Dec. 12, reports PopCulture. So don’t miss out on your chance to get Whopper for just a penny!