An adjustable camshaft may include an inner shaft and an outer shaft arranged coaxially thereto, and a phase shifter having a stator and a rotor. The stator may be connected to the outer shaft in a rotationally fixed manner, and the rotor may be connected to the inner shaft in a rotationally fixed manner. On an outside of the outer shaft, a first connection contour may be provided. The first connection contour may interact with a second connection contour on the stator formed complementarily thereto in a form-fit manner and enabling at least a tolerance offset in an axial direction.