ntpdc prints large postive pll offset instead of small negative

Issue

Huge pll offset in ntpdc -c kerninfo

# ntpdc -c kerninfo
pll offset:           4294.96 s           <==== huge offset
pll frequency:        48.040 ppm
maximum error:        0.116186 s
estimated error:      0.006917 s
status:               0001  pll
pll time constant:    2
precision:            1e-06 s
frequency tolerance:  512 ppm