The king in a Super Bowl commercial for Bud Light may have “just wanted to return some corn syrup to its rightful owners” in the Coors Light and Miller Lite castles, but MillerCoors, which produces both beers, was not amused.

MillerCoors sued Anheuser-Busch on Thursday over the ad, claiming that it purposely misled consumers into believing there is corn syrup in Coors Light and Miller Lite, when there is not.

The lawsuit, filed in United States District Court for the Western District of Wisconsin, comes nearly two months after the ad for Bud Light first aired, on Feb. 3, sparking a feud between the beer companies and anger from corn lobbyists. MillerCoors is asking for an injunction to stop Anheuser-Busch from continuing to air the ad, which it calls “false and misleading.”

In the ad, the king of the Bud Light Castle mistakenly receives a barrel of corn syrup and travels far across the land to deliver it to the correct address. When he and his companions arrive at the Coors Light castle, its king says, “Looks like the corn syrup has come home to be brewed.” The lawsuit claims that this statement, in particular, makes it seem as if corn syrup may be the only ingredient in Coors Light.