In this comment, some remarks are proposed on José-Philippe Pérez’s article ‘Redshift formulas and
the Doppler–Fizeau effect’ (2016 Eur. J. Phys. 37 015604
[http://dx.doi.org/10.1088/0143-0807/37/1/015604] ). Presentation of the gravitational redshift in
second part of section 3.1 of that article is shown to be incorrect. The correct derivation is
presented.