A sash lock mechanism includes a handle, a housing adapted to be supported by a sash window assembly, the housing having an opening receiving the handle therethrough, and a rotor coupled to the handle. The rotor is moveable between at least a locked position and an unlocked position by movement of the handle. The sash lock mechanism also includes a locking mechanism that contains a pivotable member pivotably connected to the housing. The pivotable member is pivotable between a first position and a second position. When the rotor is in the locked position and the pivotable member is in the first position, the pivotable member confronts the rotor to prevent movement of the rotor to the unlocked position. When the pivotable member is in the second position, the pivotable member does not prevent movement of the rotor.