A California city voted to criminalize “aiding” and “abetting” homeless camps Tuesday – an unusual move that advocates say could stifle aid to help for people who need it.

The action by the city of Fremont, California, comes after a Supreme Court ruling in June that emboldened communities across the country to limit protections for people without homes. The court’s decision in Grants Pass, Oregon v. Johnson lets cities ban homeless residents from sleeping outside, even when a community lacks indoor shelter beds.

Outreach workers in the California city of Fremont worry the new homelessness ordinance could target them, despite assurances from the city.