Indie-pop band Lucius have spoken out against the allegedly uncredited use of their vocals on Harry Styles' Fine Lines album.

The Styles track 'Treat People With Kindness' prominently features the artist's work, but their name is not officially listed with the song on some streaming platforms. The duo are credited on the song as vocalists when you click through to view the song’s credits, but don’t receive a prominent featured artist credit on streaming platforms.

Lead singers Jesse Wolfe and Holly Laessig also claim to have been uninformed on the extent of the feature.

“We thought he was gonna add on top after and that we’d be in the background,” Laessig told the Los Angeles Times. Wolfe added, “Two weeks later, they sent us the track, and it was literally us. We start the song, we sing every chorus, just us. We trade off the bridge."

"It just hurt,” Wolfe admits, “Here was an opportunity to spread the love a little bit, which he purports to do all the time. And it could’ve really helped us. I’ve been to Harry shows and he’s always been very charming and kind. We’ve sung live with him.”

It seems that they were made aware of the dilemma beforehand, though. Laessig reveals being told, "We’re not having any features on the record. And if you don’t want that, then we’ll just take your voices off and replace them.”

Styles has not yet responded to these statements. The solo artist is currently preparing to headline Coachella April 15 and 22 before releasing his third album Harry's House on May 20.

Lucius' latest album Second Nature was released on April 8.