  We report here a new result extracted from the Fermi Large Area Telescope
observation of the classical nova ASASSN-16ma that exhibits coherent gamma-ray
pulsations at 544.84(7) seconds during its outburst in 2016. Considering the
number of independent trials, the significance of the evidence is 4.0 sigma,
equivalent to a false alarm probability of 5.9e-5. The periodicity was steady
during the 4 days of its appearance, indicating its origin as the spinning
signal of the white dwarf. Given that the optical and gamma-ray light curves of
some shock-powered gamma-ray novae have been recently shown closely correlated
to each other, the gamma-ray pulsation phenomenon likely implies an existence
of the associated optical pulsations, which would provide detailed ephemerides
for these extreme white dwarf binaries for further investigations in the near
future.
