The U.S. Department of Agriculture (USDA) listed ‘Wakanda’, the fictional nation of Marvel superhero movie Black Panther, as a free-trade agreement partner in a bureaucratic mishap.

Until Wednesday afternoon, the fictional east African country was listed on the USDA’s foreign agricultural service’s tariff tracker. A USDA spokesperson said the fictional nation was added to its system by mistake during tests officials were running.

“The foreign agricultural service staff who maintain the tariff tracker have been using test files to ensure that the system is running properly,” Mike Illenberg, a USDA spokesperson, told TIME. “The Wakanda information should have been removed after testing and has now been taken down.”

According to the site, Wakanda’s exports to the U.S. included horses, sheep, goats and turkeys. Wakanda first appeared in the Fantastic Four comic in 1966, and reappeared when Black Panther was adapted into an Oscar-winning film last year.

The mistake was first noticed by Francis Tseng, a fellow at the Jain Family Institute on Wednesday morning when researching how trade deals can affect food distribution in countries listed as U.S. trade partners.

“I definitely did a double take,” Tseng told NBC. “I googled Wakanda to make sure it was actually fiction, and I wasn’t misremembering. I mean, I couldn’t believe it.”

The fictional country was removed from the list after NBC queried the addition.

Get The Brief. Sign up to receive the top stories you need to know right now. Please enter a valid email address. Sign Up Now Check the box if you do not wish to receive promotional offers via email from TIME. You can unsubscribe at any time. By signing up you are agreeing to our Terms of Use and Privacy Policy . This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply. Thank you! For your security, we've sent a confirmation email to the address you entered. Click the link to confirm your subscription and begin receiving our newsletters. If you don't get the confirmation within 10 minutes, please check your spam folder.

Contact us at letters@time.com.