CHICAGO — McDonald’s and Starbucks are implementing filtering technology that blocks customers using Wi-Fi from accessing pornography sites.

The move follows a campaign from anti-pornography groups Enough is Enough and the National Center on Sexual Exploitation to demand the chains filter out pornography.

Oak Brook, Illinois-based McDonald’s said in a statement that Wi-Fi filtering has been activated in the majority of its nearly 14,000 restaurants nationwide. A spokesman for Seattle-based Starbucks said it is implementing filtering once it can find a system that “also doesn’t involuntarily block unintended content.”

Enough is Enough President Donna Rice Hughes applauded the moves and said the organization plans to push other businesses and venues to filter their Wi-Fi.

The National Center for Sexual Exploitation said chains such as Chick-fil-A and Panera Bread already block porn on Wi-Fi.