An air-handling system includes a housing having a passageway formed therethrough. A diverter is rotatably coupled to the housing, and includes a door disposed in the passageway for selectively opening and closing the passageway. A shaft of the door extends through a first opening of the housing, and extends outwardly therefrom, defining a first axis. A lever is coupled to the shaft of the diverter. A flexible tab is disposed axially outwardly of the lever and is positionable in a first position and a second position. In the first position, a distal end of the tab is positioned radially inwardly of an outer circumferential surface of the lever, and in the second position the distal end of the tab is positioned radially outwardly of the outer circumferential surface of the lever. The distal end is moveable about a second axis, parallel to the first axis.