A method for mounting an integral inner ring (10) of a turbocompressor stator to a guide vane ring (12) comprises the following steps: -Providing the guide vane ring (12) with an inner radius S; -Providing inner ring (10) with an outer radius R, which corresponds to the inner radius S; -Pre-tensioning inner ring (10) to an outer radius r that is smaller than the outer radius R of the untensioned inner ring (10); and -Relaxing inner ring (10) to the outer radius R.