The application relates to a floor covering of an escalator or moving walkway. The floor covering has a floor covering support, a first covering element and at least one adjoining covering element. At least one device which predetermines a single-possible, correct installation position of the covering elements on the floor covering support is arranged between at least the first covering element and the adjoining covering element, wherein, in the correct installation position, the first covering element and the adjoining covering element are arranged to be flush with the floor covering support and, in an incorrect installation position, at least part of the adjoining covering element is arranged in a visibly protruding manner on the floor covering support due to the device.