A method for controlling a pre-spin operation (PRE-SPIN) of a compressor of an internal combustion engine, wherein the internal combustion engine comprises: an air intake, a compressor conduit, a bypass conduit and a turbocharger, wherein • the air intake is in fluid communication with an air inlet of the turbocharger, • the compressor conduit comprises a compressor and is arranged between the air intake and the turbocharger such that the compressor is in fluid communication with the air intake and the turbocharger, and • the bypass conduit comprises a bypass throttle and is arranged in fluid communication with the air intake and the turbocharger inlet such that the bypass conduit bypasses the compressor, wherein a compressor clutch connects the compressor to a crankshaft of the internal combustion engine such that the compressor can be engaged and disengaged from the crankshaft, wherein the bypass throttle can be controlled by setting a bypass throttle angle such that the bypass throttle can be controlled between an open and a closed position, and wherein the method comprises checking a number of conditions, such that checking if: • the compressor clutch is in a disengaged state, • the internal combustion engine load is in a predetermined load range, • the air mass flow delivered by the turbocharger is within a predetermined mass flow range, • the compressor speed is below a threshold value, and • the bypass throttle is at least partially open, and if the conditions are fulfilled the following is performed: • calculating a bypass throttle angle (BT-α) dependent on at least a mass flow over the internal combustion engine and a target pressure difference over the compressor such that ∘ a predetermined pre-spin of said compressor is achieved, ∘ the internal combustion engine load stays in the predetermined load range, and ∘ the air mass flow delivered by the turbocharger stays within the predetermined mass flow range, • setting the bypass throttle angle (BT-α) according to what has been calculated (SET α). an air intake, a compressor conduit, a bypass conduit and a turbocharger, wherein • the air intake is in fluid communication with an air inlet of the turbocharger, • the compressor conduit comprises a compressor and is arranged between the air intake and the turbocharger such that the compressor is in fluid communication with the air intake and the turbocharger, and • the bypass conduit comprises a bypass throttle and is arranged in fluid communication with the air intake and the turbocharger inlet such that the bypass conduit bypasses the compressor, wherein • the air intake is in fluid communication with an air inlet of the turbocharger, • the compressor conduit comprises a compressor and is arranged between the air intake and the turbocharger such that the compressor is in fluid communication with the air intake and the turbocharger, and • the bypass conduit comprises a bypass throttle and is arranged in fluid communication with the air intake and the turbocharger inlet such that the bypass conduit bypasses the compressor, wherein a compressor clutch connects the compressor to a crankshaft of the internal combustion engine such that the compressor can be engaged and disengaged from the crankshaft, wherein the bypass throttle can be controlled by setting a bypass throttle angle such that the bypass throttle can be controlled between an open and a closed position, and wherein the method comprises checking a number of conditions, such that checking if: • the compressor clutch is in a disengaged state, • the internal combustion engine load is in a predetermined load range, • the air mass flow delivered by the turbocharger is within a predetermined mass flow range, • the compressor speed is below a threshold value, and • the bypass throttle is at least partially open, • the compressor clutch is in a disengaged state, • the internal combustion engine load is in a predetermined load range, • the air mass flow delivered by the turbocharger is within a predetermined mass flow range, • the compressor speed is below a threshold value, and • the bypass throttle is at least partially open, and if the conditions are fulfilled the following is performed: • calculating a bypass throttle angle (BT-α) dependent on at least a mass flow over the internal combustion engine and a target pressure difference over the compressor such that ∘ a predetermined pre-spin of said compressor is achieved, ∘ the internal combustion engine load stays in the predetermined load range, and ∘ the air mass flow delivered by the turbocharger stays within the predetermined mass flow range, • setting the bypass throttle angle (BT-α) according to what has been calculated (SET α). • calculating a bypass throttle angle (BT-α) dependent on at least a mass flow over the internal combustion engine and a target pressure difference over the compressor such that ∘ a predetermined pre-spin of said compressor is achieved, ∘ the internal combustion engine load stays in the predetermined load range, and ∘ the air mass flow delivered by the turbocharger stays within the predetermined mass flow range, ∘ a predetermined pre-spin of said compressor is achieved, ∘ the internal combustion engine load stays in the predetermined load range, and ∘ the air mass flow delivered by the turbocharger stays within the predetermined mass flow range, • setting the bypass throttle angle (BT-α) according to what has been calculated (SET α).