Rob Anderson, 39, said he went to the Marathon gas station in Georgetown, Ky., on Christmas Eve to purchase three $1 lottery tickets to give as gifts, but the clerk instead gave him one $3 Quick Pick ticket, the Louisville (Ky.) Courier reported Thursday.
"I was like, 'Doggone it, I needed three separate tickets,'" Anderson said. However, he said he decided to keep the ticket because he had "a couple extra dollars" to buy the gift tickets.
Anderson said the clerk's error resulted in his $128.6 million Powerball jackpot, the largest in Kentucky history.
The autoworker and his wife said they have many decisions ahead about the money, including whether to keep their jobs and home.
"We're really grounded people; my wife has taught me well," Anderson said. "We'll still clip coupons and still look at the clearance rack."