Method for operating a combustion engine

Method for operating an internal combustion engine (1), in particular a gas engine, with at least one combustion chamber (2), to which charge air (A) with a variable charge pressure (p a ) and / or a variable charge air quantity is supplied, wherein from at least one measured value (p c ) of a sensor (3) arranged in the at least one combustion chamber (2) a cylinder pressure value (p i ) is determined, wherein the cylinder pressure value (p i ) is regulated to a cylinder pressure setpoint (p s ) by changing the charge pressure (p a ) and / or by changing the charge air quantity as manipulated variable(s), wherein the cylinder pressure setpoint (p s ) is selected as a function of a power (P) of the internal combustion engine (1).