Nine Inch Nails front man Trent Reznor and The Mars Volta are set to appear on rapper El-P�s new album.

The record entitled �I�ll Sleep When You�re Dead� is the follow up to his 2002 effort �Fantastic Damage�.

According to Reuters Reznor will feature on the track �Flyentology� while The Mars Volta have been working on a song that "is still getting structured" and is as of yet unnamed.

El-P has previously remixed the Nine Inch Nails track �Only� for the EP �Every Day Is Exactly The Same�.