Abstract: A latch for a gliding door unit includes a latch assembly mounted in the leading edge of a gliding door and a complementing keeper assembly mounted in the facing jamb of the door unit. The latch assembly has a face plate from which a latch can be deployed by operation of a handle on the gliding door. The keeper assembly has a strike plate and a keeper. The door is latched shut by sliding the gliding door against the jamb and operating the handle, whereupon the latch deploys from the face plate to lodge behind and capture the latch. The latch mechanism includes an anti-activation mechanism that includes a depressible trigger projecting from the face plate toward a target zone on the strike plate. The latch is operable when the trigger is depressed and is prevented from being operated when the trigger is extended. A fault aperture is formed in the strike plate below the target zone.