McDonald’s has filed a trademark-infringement claim against a Chicago-area teenager who coordinates a Special Olympics fund-raiser called “McFest,” reports the Chicago Sun-Times.

Lauren McCluskey, 19, said she named the annual charity concert by high-school and college bands as a play on her own surname. The fast-food chain, which holds trademarks on a variety of “Mc”-related terms, challenged Ms. McCluskey’s attempt to register “McFest” with the U.S. Patent and Trademark Office.

Ms. McCluskey, who said she has paid $5,000 in legal costs so far, has until February 5 to file a response to the McDonald’s challenge, with a trial set for December. A company spokeswoman said McDonald’s does not want to shut down the event and has offered to pay costs associated with renaming it.