The invention relates to a method for reducing register errors on a web of material (04) moving through the printing nip of a multicolor web-fed rotary press, comprising the following steps: providing a portion between an area of the web of material (04) located between the two lateral edges of the web of material (04) and areas in the vicinity of the lateral edges of the web of material with a deformation relative each other in a direction perpendicular to the plane of rotation of the web of material (04) subject to a register error occurring in the direction of rotation of the web of material (04).