Locking device with arrangement for selecting an active side of a door, the locking device comprising - a first side configured to face a first side of a door and a second side configured to face a second side of a door when the locking device is mounted in the door, - a bolt that is configured to move between an extended position and a retracted position, said movement being in a direction parallel to the first side and the second side, and - a bolt operating mechanism configured to control a position of the bolt, and the arrangement comprising - a first handle receiving portion arranged on the first side of the locking device, and configured to rotate when a first handle is operated, - a second handle receiving portion arranged on the second side of the locking device, and configured to rotate when a second handle is operated, wherein the first handle receiving portion and the second handle receiving portion are configured to move independently of each other; the arrangement also comprising - a connector configured to transmit a movement from the first handle receiving portion or the second handle receiving portion to the bolt operating mechanism of the locking device; - an actuator movable from a first position, in which it connects the first handle receiving portion to the connector to a second position in which it connects the second handle receiving portion to the connector, so that a rotation of the first handle receiving portion or second handle receiving portion is configured to generate a movement of the bolt; - and a fastening device configured to fixate the actuator in the first position or the second position, said locking device being characterised in that the fastening device is configured to be accessible from a third side of the locking device, said third side being essentially perpendicular to the first and second side. - a first side configured to face a first side of a door and a second side configured to face a second side of a door when the locking device is mounted in the door, - a bolt that is configured to move between an extended position and a retracted position, said movement being in a direction parallel to the first side and the second side, and - a bolt operating mechanism configured to control a position of the bolt, - a first handle receiving portion arranged on the first side of the locking device, and configured to rotate when a first handle is operated, - a second handle receiving portion arranged on the second side of the locking device, and configured to rotate when a second handle is operated, wherein the first handle receiving portion and the second handle receiving portion are configured to move independently of each other; - a connector configured to transmit a movement from the first handle receiving portion or the second handle receiving portion to the bolt operating mechanism of the locking device; - an actuator movable from a first position, in which it connects the first handle receiving portion to the connector to a second position in which it connects the second handle receiving portion to the connector, so that a rotation of the first handle receiving portion or second handle receiving portion is configured to generate a movement of the bolt; - and a fastening device configured to fixate the actuator in the first position or the second position, said locking device being characterised in that the fastening device is configured to be accessible from a third side of the locking device, said third side being essentially perpendicular to the first and second side.