A telescopic mast has a plurality of telescopic sections with longitudinally extending walls, a transverse dimension of the innermost telescopic section being smaller than the outermost telescopic section of two adjacent telescopic sections, so that the innermost telescopic section can slide longitudinally in and out of the outermost of two adjacent telescopic sections. A restrictor is provided between the two adjacent telescopic sections, the restrictor having a longitudinally extending linear guide provided on one of two adjacent telescopic sections and a clamping device provided on the other one of two adjacent telescopic sections, wherein the clamping device is configured for providing a clamping force to the guide during relative movement of said two adjacent telescopic sections, wherein the clamping force has two oppositely directed rotational force components in a plane normal to the longitudinal direction of the mast and perpendicular to the radius of the mast through the guide.