The invention relates to an axial fixation (17) of a spring support part (9) of a switchable tappet (1) for direct transmission of a cam stroke to a tappet push-rod (7) of a valve drive of an internal combustion engine. The tappet (1) has an inner part (3), which receives the force of a spring means (13), in that the spring support part (9) used as a support (12) for the spring means (13) is fixed axially to the inner part (3) in a direction of force of the spring means (13), such that the spring support part (9) and the inner part (3) face each other in a region of the axial fixation (17) and form a common channel (18) by means of formed parts (20, 23) aligned with each other, in which a retaining ring (19) is arranged for positive-fit connection of the spring support part (9) to the inner part (3). The retaining ring (19) is formed from a wire (24), which can be inserted essentially tangentially into the annular channel (18) through an opening (25) arranged in the inner part (3) or in the spring support part (9) and opening into the annular channel (18).