A method for stabilizing a multiphase flow in a flow line, where instability of the multiphase flow is caused by at least one slug. At least one pressure variable is continuously measured at a flow line inlet upstream of the point where the main part of the slug is generated. The pressure variable is supplied to a dynamic feedback controller, wherein the pressure variable upstream of the slug is an input to the dynamic feedback controller. An output of the dynamic feedback controller is continuously calculated. A control valve at said flow line is controlled by the output from the dynamic feedback controller, wherein the multiphase flow is stabilized throughout the flow line.