29-year-old Pirro's two previous outings this year came at Mugello, where he finished eighth, and at Misano, where he qualified a creditable fifth but suffered a technical problem on the grid.

Pirro joins Ducati regulars Andrea Iannone and Andrea Dovizioso on board a third Desmosedici GP15 machine.

“I am pleased to take part in the final race of the MotoGP season at Valencia, because for me it is very important to be able to confirm the progress of the GP15 and the form I showed at Misano, unfortunately only in practice," said Pirro.

"I want to make amends for the misfortune I had in the San Marino GP and I am confident I can have a good weekend.”

Pirro is no stranger to success at Valencia, having won his final Moto2 race at the Spanish track in 2011 before graduating to MotoGP in 2012.