The organizers of San Francisco’s popular Outside Lands music festival in Golden Gate Park have banned Native American headdresses at the event.

“Out of respect for Native American heritage and culture, we do not allow headdresses at Outside Lands,” organizers said in a statement to The San Francisco Chronicle Thursday. “We are committed to creating a safe, respectful and inclusive environment for all.”

The music event, which runs from Aug. 9-11, in the past has attracted more than 200,000 attendees. It will feature Childish Gambino, Counting Crows, Paul Simon, Lil Wayne, Blink-182, Kacey Musgraves and scores of others this year.

The war bonnet ban was hailed by Adrienne Keene, an assistant professor of American Studies at Brown University in Rhode Island whose social media sites call out “Native appropriations.” Keene objected to Outside Lands organizers’ use of the singular term “culture” in their statement, noting that there are hundreds of different Native American cultures. But she added in a tweet: “I’ll take it!” Keene has frequently lashed what she calls “hipster headdresses” that have become part of festival fashion.