A baler for forming round bales includes a wrapping device for wrapping a pressed bale with a wrapping material, a pressing chamber where the pressed bale is formed, a guide apparatus for guiding wrapping material to the pressing chamber, and a guide means for guiding the wrapping material via a region from the wrapping device to the guide apparatus. The guide means is movable between a first position and a second position. In the first position, the guide means substantially bridges the region between the wrapping device and the guide apparatus. In the second position, the guide means at least partially opens up the region therebetween.