An exhaust gas guide section for an exhaust gas turbocharger includes an actuator (1) with a wastegate (9) for opening and closing a bypass channel (31) of the exhaust gas guide section (1), wherein the bypass channel (31) is provided in the exhaust gas guide section (1) that can be flowed through to bypass a turbine wheel of the exhaust gas guide section (1) which is rotatably arranged in the exhaust gas guide section (1) in a wheel chamber of the exhaust gas guide section (1), and wherein the bypass channel (31) has a second flow cross section (33).