An adapter for attaching a wiper assembly to a wiper arm having an attachment member including an end with a bent tab extending outwardly therefrom, and walls having fins. The adapter includes a body having first and second ends. A retention member is disposed at the first end for abutting the fin. A canard extends from the retention member toward the second end and is adapted to be disposed adjacent to one of the walls. A stop is disposed closer to the second end than the first. A guard is spaced longitudinally from the stop and has a cam surface and an engagement surface. A bridge connects the guard to the body and is adapted to flex when the guard pivots from the stop in response to force translated to the cam surface from the bent tab until the engagement surface abuts at least a portion of the bent tab.