Social media site Instagram dealt a setback to the “Free the Nipple” movement, issuing new guidelines that include a ban on nudity.

PCMag reports that the site, owned by Facebook, is taking a “stronger stance against photos that it deems inappropriate.”

According to the report, the new guidelines state: “We know that there are times when people might want to share nude images that are artistic or creative in nature. But for a variety of reasons, we don’t allow nudity on Instagram.”

PCMag adds: “Specifically, that includes photos, videos, and some digitally created content showing sexual intercourse, genitals, and close-ups of fully nude buttocks.”

The ban on female nipples has some exceptions, according to the report, such as photos of post-mastectomy scarring and of women breastfeeding, along with some nudity in photographs of paintings and sculptures.

The PCMag story adds: “The move comes after celebrities like Miley Cyrus joined the so-called ‘Free the Nipple’ campaign, which protests what supporters call a double standard on Instagram regarding nudity: shirtless men are allowed, but shirtless women are not.”