A floor cover of an escalator or a moving walkway is described. The floor cover has a floor cover support and at least one cover element. The opening of a space provided under the floor to the surrounding floor which can be walked on can be closed in a flush manner by at least one cover element which lies on the floor cover support. The floor cover includes at least one device by which one single possible correct installation position of the at least one cover element on the floor cover support is specified. In the correct installation position, the cover element lies flush on the floor cover support, and in an incorrect installation position, the device causes at least one part of the cover element is arranged so as to visibly project beyond the floor cover support.