An implantable compensating sleeve is applied between an oblong implant section of a first implant, and a second implant that encloses the oblong implant section of said first implant. The compensating sleeve has a sheath having a sheath body and a passage, running from the proximal to the distal end of the sheath body, for receiving said oblong implant section of the first implant. The sheath body is divided, by slits which cut into the sheath body in the longitudinal direction and originate alternately from the distal and from the proximal edge of the sheath body, into meander-like segments each comprising two longitudinal arms. The sheath body is radially expandable in at least one subsection. On the inner surface of the sheath body facing the passage, at least one bulge extends in the longitudinal direction of a meander-like segment, forming an inner profile that protrudes into the passage.