A coupling bushing for a semiautomatic fluid coupling, wherein the coupling bushing has a coupling body, wherein the coupling bushing is designed to enter into a detachable latched connection with a coupling plug that can be inserted into the coupling bushing, wherein the coupling bushing comprises a plug fuse, wherein the plug fuse has a retainer and an indicator, wherein a retaining section of the retainer is designed to lock a coupling plug in the coupling body, wherein the plug fuse is arranged in a plug section of the coupling body, wherein the plug section has a central axis, wherein, as viewed from the side, the plug fuse can be introduced into the coupling body in a radial direction, wherein the coupling bushing is designed in such a way that the plug fuse can assume a radially extended and a radially retracted position relative to the coupling body, wherein the coupling bushing is designed in such a way that the coupling plug is secured by the retainer in the coupling body in an axial direction with the plug fuse in the retracted position, wherein the indicator has two legs (11a, 11b) and a back, wherein a floor of the coupling body is allocated to the ends of the legs (11a, 11b) facing away from the back, wherein the indicator is designed, when introducing the coupling plug, to react to a direct or indirect contact with the coupling plug, so that a deflection of the indicator automatically transfers the plug fuse from the extended position into the retracted position, characterized in that the coupling bushing is designed in such a way as to deflect the legs (11a, 11b) in an axial direction during an introductory motion of the coupling plug, wherein the coupling bushing is designed in such a way that floor ends of the legs (11a, 11b) maintain their distance from each other during the deflection by the coupling plug. wherein the plug fuse is arranged in a plug section of the coupling body, wherein the plug section has a central axis, wherein, as viewed from the side, the plug fuse can be introduced into the coupling body in a radial direction, wherein the coupling bushing is designed in such a way that the plug fuse can assume a radially extended and a radially retracted position relative to the coupling body, wherein the coupling bushing is designed in such a way that the coupling plug is secured by the retainer in the coupling body in an axial direction with the plug fuse in the retracted position, wherein the indicator has two legs (11a, 11b) and a back, wherein a floor of the coupling body is allocated to the ends of the legs (11a, 11b) facing away from the back, wherein the indicator is designed, when introducing the coupling plug, to react to a direct or indirect contact with the coupling plug, so that a deflection of the indicator automatically transfers the plug fuse from the extended position into the retracted position, characterized in that the coupling bushing is designed in such a way as to deflect the legs (11a, 11b) in an axial direction during an introductory motion of the coupling plug, wherein the coupling bushing is designed in such a way that floor ends of the legs (11a, 11b) maintain their distance from each other during the deflection by the coupling plug.