  In a recent paper Das {\it et al.} [J. Chem. Phys. {\bf 147}, 164102 (2017)]
proposed the Fokker-Planck equation (FPE) for the Brownian harmonic oscillator
in the presence of magnetic field and the non-Markovian thermal bath,
respectively. This system has been studied very recently by J. C.
Hidalgo-Gonzalez and J. I. Jim\'enez-Aquino [Phys. Rev. E {\bf{100}}, 062102
(2019)] and the Fokker-Planck equation was derived using the characteristic
function. It includes a few extra terms in the FPE and the authors conclude
that their method is accurate compared to the calculation by Das {\it et al.}.
Then we reexamine our calculation and which is present in this comment. The
revised calculation shows that both the methods give the same result.
