Google appeared to stymie a marketing stunt on Wednesday by Burger King, which had introduced a television ad intended to prompt voice-activated Google devices to describe its burgers.

A video from a Burger King marketing agency showed the plan in action: “You’re watching a 15-second Burger King ad, which is unfortunately not enough time to explain all the fresh ingredients in the Whopper sandwich,” the actor in the commercial said. “But I got an idea. O.K. Google, what is the Whopper burger?”

Prompted by the phrase “O.K. Google,” the Google Home device beside the TV in the video lit up, searched the phrase on Wikipedia and stated the ingredients.

But within hours of the ad’s release — and humorous edits to the Whopper Wikipedia page by mischievous users — tests from The Verge and BuzzFeed showed that the commercial had stopped activating the device.