The Knack has beef with Run DMC, but it's taken them 20 years to realize it.

Didn't listen to a lot of hip-hop in the '80s.

Two members of the '80s one-hit wonders have filed a lawsuit against Run DMC and its producers, publishers, distributors, record labels, and those that sell its records, claiming the Queens trio infringed on its copyright.

The complaint, filed in US District Court in Los Angeles Friday, claims the rap group never obtained permission to use the signature guitar lick from the Knack's 1979 hit "My Sharona" in their 1986 song "It's Tricky." The suit claims that band members Doug Fieger and Berton Averre never heard "It's Tricky" until 2005, nearly 20 years after it was recorded.

"That sound is not only the essence of 'My Sharona,' it is one of the most recognizable sounds in rock 'n' roll," Knack frontman Doug Fieger said.

In addition to Run DMC members Joseph ("Run") Simmons, Darryl ("DMC") McDaniel, and the estate of Jason ("Jam Master Jay") Mizell, who was shot and killed in 2004, the claim names several other parties as defendants: the song's producer Rick Rubin and his production companies, Arista Records and the group's publishing outfits. It also names Amazon.com, Apple's iTunes store, Napster, Yahoo, and others for having sold copies of the song over the Internet.

The Knack's "My Sharona.

The document asserts that, because of Run DMC's sampling of "My Sharona," Fieger and Averre have "suffered actual damages, including lost profits, lost opportunities, loss of goodwill, lost publicity, attorneys' fees and interest."

The lawsuit seeks unspecified damages, but claims that each of the defendants owes the plaintiffs $150,000 for every copy of "It's Tricky" that has been sold, including those on the 1986 album Raising Hell and subsequent Run DMC greatest hits collections that have included it.

"Our clients created a unique and distinctive musical composition in "My Sharona," Dick Schultz, attorney for Fieger and Averre, said in a statement. "Others shouldn't be allowed to profit from the unauthorized use of that creation. That is what copyright laws are for, and we are protecting our clients' rights in their creation."