The products in question, which were distributed to retail stores in two states, may contain an allergen, according to the company.

Frito-Lay has begun a a “limited recall" of Lay’s Classic Potato Chips due to an undeclared allergen, according to an FDA announcement. Certain bags may contain a milk allergen.

The Food and Drug Administration (FDA) announced on Wednesday (December 18) that Frito-Lay issued a recall on a “limited number” of the 13. oz bags of chips. These Lay’s Classic Potato Chips bags were recalled because they “may contain undeclared milk ,” which Frito-Lay learned “after being alerted through a consumer contact.”