An air line supplying charged air to a combustion engine comprising a compressor arrangement, wherein the compressor arrangement comprises: - a compressor unit comprising a housing including an air intake passage, a compressor wheel arranged in said air intake passage, and an additional air passage (24, 26, 28, 29, 30) allowing recirculation of air from the air intake passage in a position radially outwardly of a part of the compressor wheel to an air conduit delivering an air flow to the air intake passage of the compressor unit in a position located at an average flow distance from the compressor wheel, - a part of the additional air passage is defined by a return conduit having an extension between a downstream end connected to an opening 28 in the housing and an upstream end, the air conduit has a curved portion (9a 1) closed to the intake passage of the compressor unit, wherein the return conduit is configured to return air to an upstream position of said curved portion of the air conduit, characterized in that the upstream end of the return conduit is connected to an opening through the air conduit and - the average flow distance is defined as a distance along a center axis in the air conduit, from a first plane transverse through the air conduit where the air opening is arranged, to a second transverse plane extending through a front surface of the compressor wheel, the average flow distance corresponding to at least 1,5 times the inlet diameter (d) of the compressor wheel. - a compressor unit comprising a housing including an air intake passage, a compressor wheel arranged in said air intake passage, and an additional air passage (24, 26, 28, 29, 30) allowing recirculation of air from the air intake passage in a position radially outwardly of a part of the compressor wheel to an air conduit delivering an air flow to the air intake passage of the compressor unit in a position located at an average flow distance from the compressor wheel, - a part of the additional air passage is defined by a return conduit having an extension between a downstream end connected to an opening 28 in the housing and an upstream end, the air conduit has a curved portion (9a 1) closed to the intake passage of the compressor unit, wherein the return conduit is configured to return air to an upstream position of said curved portion of the air conduit, characterized in that the upstream end of the return conduit is connected to an opening through the air conduit and the air conduit has a curved portion (9a 1) closed to the intake passage of the compressor unit, wherein the return conduit is configured to return air to an upstream position of said curved portion of the air conduit, characterized in that the upstream end of the return conduit is connected to an opening through the air conduit and - the average flow distance is defined as a distance along a center axis in the air conduit, from a first plane transverse through the air conduit where the air opening is arranged, to a second transverse plane extending through a front surface of the compressor wheel, the average flow distance corresponding to at least 1,5 times the inlet diameter (d) of the compressor wheel.