Control arrangement for a gas exchange valve of an internal combustion piston engine, comprising - a cam device with a cam profile, the cam profile having a base circle (18.1) and a portion arranged radially inside (18.4) and radially outside (18.3) the base circle, - a cam follower unit adapted to reciprocate under control of the cam profile, - a first piston unit in force transmission connection with the cam follower unit , and configured to transmit valve lifting force from the cam device to the gas exchange valve for lifting the gas exchange valve , - a hydraulic control space arranged between the first piston unit and the cam follower unit , wherein the first piston unit is affected by a spring configured to push the first piston unit towards the cam follower unit with a force that is stronger than hydraulic force obtainable from the hydraulic control space , characterized by - a mechanical limiter configured to prevent movement of the first piston unit in a direction closing the valve at a predetermined location of the first piston unit , which limiter is positioned at a predetermined distance from the first piston unit when the cam follower unit rests on the base circle of the cam profile, when the hydraulic control space is pressurized, said predetermined distance is equal to a maximal radial deviation of the portion of the cam profile radially inside (18.4) the base circle from said base circle of the cam profile, - a hydraulic fluid flow path opening into the hydraulic control space and connectable to a hydraulic fluid supply , adapted to fill the hydraulic control space with the hydraulic fluid, wherein the hydraulic fluid flow path is configured to open and to close on the basis of the position of the cam follower unit . - a cam device with a cam profile, the cam profile having a base circle (18.1) and a portion arranged radially inside (18.4) and radially outside (18.3) the base circle, - a cam follower unit adapted to reciprocate under control of the cam profile, - a first piston unit in force transmission connection with the cam follower unit , and configured to transmit valve lifting force from the cam device to the gas exchange valve for lifting the gas exchange valve , - a hydraulic control space arranged between the first piston unit and the cam follower unit , wherein the first piston unit is affected by a spring configured to push the first piston unit towards the cam follower unit with a force that is stronger than hydraulic force obtainable from the hydraulic control space , characterized by - a mechanical limiter configured to prevent movement of the first piston unit in a direction closing the valve at a predetermined location of the first piston unit , which limiter is positioned at a predetermined distance from the first piston unit when the cam follower unit rests on the base circle of the cam profile, when the hydraulic control space is pressurized, said predetermined distance is equal to a maximal radial deviation of the portion of the cam profile radially inside (18.4) the base circle from said base circle of the cam profile, - a hydraulic fluid flow path opening into the hydraulic control space and connectable to a hydraulic fluid supply , adapted to fill the hydraulic control space with the hydraulic fluid, wherein the hydraulic fluid flow path is configured to open and to close on the basis of the position of the cam follower unit . <EOS>