Frito-Lay is recalling a limited number of Tostitos tortilla chips because they may contain undeclared milk. The company said Wednesday that the recall includes less than 1,300 13-ounce bags of Tostitos Cantina Traditional Yellow Corn Tortilla Chips.

The bags could contain nacho cheese-flavored tortilla chips. People with an allergy or severe sensitivity to milk could have a serious reaction if they eat the chips. Frito-Lay said there have been no reported allergic reactions related to the recall. The affected bags were distributed to a mix of retailers in 13 Southern and Midwestern states. All of the affected bags have a “guaranteed fresh” date of May 20.