In a motor braking arrangement for an internal combustion engine including a turbocharger having a charger connected to the engine by an air intake duct and a turbine connected to the engine by an exhaust gas pipe including an exhaust gas shut-off valve arranged upstream of the turbine, a by-pass line extends from the exhaust gas pipe upstream of the shut-off valve to a gas admission passage of the turbine adjacent the turbine wheel to drive the turbine wheel by the gases discharged from the exhaust gas pipe when the shut-off valve is closed for engine braking purposes.