Bypass flow channel of a turbofan engine, having follow-up guide vanes (2, 2.1) which are arranged with a regular spacing in a circumferential direction and form a follow-up guide vane ring and serve for the removal of swirl from the air flow generated by the fan, and having follow-up guide vane support struts for supporting bypass flow channel walls, - wherein the spacing between leading edges of the follow-up guide vanes (2, 2.1) and follow-up guide vane support struts is defined, characterized in that - the follow-up guide vane support struts: - are integrated into the follow-up guide vane ring, in each case instead of a follow-up guide vane, with a uniform spacing with respect to the leading edges, and - are formed with greater thickness and chord length than the follow-up guide vanes (2, 2.1) and - with an aerodynamic vane shape adapted to the latter and serving for the removal of swirl from the flow fed by the fan, - wherein a modified follow-up guide vane (2.1) of the follow-up guide vanes is arranged adjacent to the respective follow-up guide vane support strut on the suction side, - wherein the modified follow-up guide vane (2.1), in comparison with the other follow-up guide vanes, is modified in terms of geometry in a manner dependent on the respective formation of the follow-up guide vane support strut, - wherein a flow channel which is situated in each case between the suction side of the follow-up guide vane support strut and the modified follow-up guide vane (2.1) adjacent thereto on the suction side is widened by way of the modified follow-up guide vane (2.1) for the purpose of reducing the pressure peaks of a circumferential pressure field building up upstream, - wherein, for the purpose of widening the flow channel, the stagger angle of the modified follow-up guide vane (2.1) that is included by a chord length and an axial chord length of the modified follow-up guide vane (2.1) is enlarged in comparison with the stagger angle of the other follow-up guide vanes, and - wherein the leading edge angle and the trailing edge angle of the modified follow-up guide vane (2.1), for the purpose of ensuring a uniform flow-off of air (arrow X) at the follow-up guide vane ring, are adapted to the enlarged stagger angle thereof, and the trailing edge angle is correspondingly enlarged such that the flow-off (arrow X) on the modified follow-up guide vane (2.1) substantially corresponds to the flow-off on the other follow-up guide vanes. - wherein the spacing between leading edges of the follow-up guide vanes (2, 2.1) and follow-up guide vane support struts is defined, characterized in that - the follow-up guide vane support struts: - are integrated into the follow-up guide vane ring, in each case instead of a follow-up guide vane, with a uniform spacing with respect to the leading edges, and - are formed with greater thickness and chord length than the follow-up guide vanes (2, 2.1) and - with an aerodynamic vane shape adapted to the latter and serving for the removal of swirl from the flow fed by the fan, - are integrated into the follow-up guide vane ring, in each case instead of a follow-up guide vane, with a uniform spacing with respect to the leading edges, and - are formed with greater thickness and chord length than the follow-up guide vanes (2, 2.1) and - with an aerodynamic vane shape adapted to the latter and serving for the removal of swirl from the flow fed by the fan, - wherein a modified follow-up guide vane (2.1) of the follow-up guide vanes is arranged adjacent to the respective follow-up guide vane support strut on the suction side, - wherein the modified follow-up guide vane (2.1), in comparison with the other follow-up guide vanes, is modified in terms of geometry in a manner dependent on the respective formation of the follow-up guide vane support strut, - wherein a flow channel which is situated in each case between the suction side of the follow-up guide vane support strut and the modified follow-up guide vane (2.1) adjacent thereto on the suction side is widened by way of the modified follow-up guide vane (2.1) for the purpose of reducing the pressure peaks of a circumferential pressure field building up upstream, - wherein, for the purpose of widening the flow channel, the stagger angle of the modified follow-up guide vane (2.1) that is included by a chord length and an axial chord length of the modified follow-up guide vane (2.1) is enlarged in comparison with the stagger angle of the other follow-up guide vanes, and - wherein the leading edge angle and the trailing edge angle of the modified follow-up guide vane (2.1), for the purpose of ensuring a uniform flow-off of air (arrow X) at the follow-up guide vane ring, are adapted to the enlarged stagger angle thereof, and the trailing edge angle is correspondingly enlarged such that the flow-off (arrow X) on the modified follow-up guide vane (2.1) substantially corresponds to the flow-off on the other follow-up guide vanes.