  We present new surface (Doppler) images of the late-type single giant FK Com
for June-July 1996, July-August 1996, April 1997 and June 1997. These images
are compared with the previously published images from 1994 and 1995. The
consecutive maps are cross-correlated to see the possible migration of the
spots and the effects of differential rotation. The cross-correlation confirms
an average longitudinal spot migration of 0.22+/-0.03 in phase within a year.
This movement is probably an artifact caused by a difference between the
accepted rotation period and the real photometric period for these years. If
this is true, then the photometric rotation period for these years is
2.4037+/-0.0005 days. Measurements from these four years and six maps limit the
surface differential rotation to alpha=0.0001+/-0.0002, where alpha is the
difference between polar and equatorial angular velocities relative to the
equatorial angular velocity.
