Food manufacturers, take note: You might want to be a little vague on those labels.

At least according to a federal judge in Chicago, who on Thursday dismissed dozens of class actions brought over “100% Grated Parmesan Cheese” labels on containers made by Kraft and sold through private labels at Target and Wal-Mart. Plaintiffs alleged consumers were duped into buying products that said 100 percent parmesan cheese but actually contained fillers made from wood pulp. But the labels, wrote U.S. District Judge Gary Feinerman in the Northern District of Illinois, were too “ambiguous” to deceive consumers.