A popular snack food maker has recalled bags of tortilla chips that could have an undeclared allergen.

Frito-Lay said the recall covers a limited number of bags of Tostitos Cantina Traditional Yellow Corn Tortilla Chips. The chips, sold in 13 oz. size, could contain nacho cheese tortilla chips which would have milk as an ingredient. That could be dangerous for those with an allergy or severe sensitivity to milk, Frito-Law said in a statement.

“A limited number of 13 oz. bags of Tostitos Cantina Traditional Yellow Corn Tortilla Chips are being recalled as they could include nacho cheese tortilla chips, and therefore may contain an undeclared milk allergen,” the snack maker said. “Unless a consumer has a dairy allergy or sensitivity to milk, this product is safe.”

The chips were distributed in 13 states, including Alabama, Florida, Georgia, Illinois, Indiana, Kentucky, Mississippi, North Carolina, Ohio, South Carolina, Tennessee, Virginia and West Virginia. Consumers would be able to purchase the chips as early as March 7.

No allergic reactions related to the recall have been reported and no other Tostitos products, flavors or sizes are included.

The recall covers bags with UPC 28400 52848 with a “guaranteed fresh” date of May 20. You can go here to see manufacturing codes.

People with allergies or sensitivities to milk should not eat the products and should throw it away. They should also call Frito-Lay at 1-800-352-4477.