A domestic appliance includes a cover element, an optical operation indicator that can be covered by the cover element, and a fibre optic coupled to the optical operation indicator for transmitting a emitted light signal. The fibre optic has a light route along which light is guided, the light route being configured such that it can be adapted to the thickness of the cover element, and the fibre optic is composed a first part and a second part that are displaceable relative to one another. The relative displacement of the first part and the second part of the fibre optic permit adaptation of the light route to the thickness of the cover element.