Jeb Bush identified himself as Hispanic on a 2009 voter registration form, according to a report by The New York Times on Monday.

According to the voter-registration application, Bush chose Hispanic in the “race/ethnicity” field.

His wife, Columba Bush, was born in León, Mexico, and the former Florida governor speaks fluent Spanish. He also lived in Caracas, Venezuela, while working as a vice president for Texas Commerce Bank.

“LOL – come on dad, think you checked the wrong box #HonoraryLatino,” the 33-year-old Bush tweeted on Monday, with a link to the Times story. Jeb himself quickly retweeted his son’s tweet, adding, “My mistake! Don’t think I’ve fooled anyone!”

The Bush camp issued a more formal statement: “It’s unclear where the paperwork error was made,” spokeswoman Kristy Campbell emailed reporters. “The Governor’s family certainly got a good laugh out of it. He is not Hispanic.”