Apply fix proposed by @supermerill for #4289
Apply fix proposed by @supermerill for #4289

curieos/Slic3r,pieis2pi/Slic3r,alexrj/Slic3r,curieos/Slic3r,curieos/Slic3r,alexrj/Slic3r,alexrj/Slic3r,alexrj/Slic3r,pieis2pi/Slic3r,curieos/Slic3r,alexrj/Slic3r,alexrj/Slic3r,curieos/Slic3r,pieis2pi/Slic3r,pieis2pi/Slic3r,pieis2pi/Slic3r,curieos/Slic3r,pieis2pi/Slic3r