Can a plaintiff recover for failure to prevent harassment?

First, as plaintiff agrees, he must show he was subjected to unlawful harassment in order to prevail on a claim for failure to prevent harassment. (Trujillo v. North County Transit Dist. (1998) 63 Cal.App.4th 280, 289 [plaintiff cannot recover for an employer's failure to present harassment, absent a finding that the plaintiff actually suffered actionable harassment].) The failure of plaintiff's harassment claim necessarily defeats his claim for failure to prevent harassment.