Comparison of the apparent bolometric magnitude m_bol derived from Gaia data using the bolometric corrections published in DR2 with the bolometric magnitudes derived by Kerschbaum & Hron (1996) from SED fits to multi-band photometry. The LPV sample consists of all LPVs from Kerschbaum et al. (2010) for which a Gaia crossmatch is published in the DR2 LPV catalogue. M-, S-, and C-type stars are plotted as blue filled circles, green filled triangles, and red filled squares, respectively. Stars of unknown type are plotted as black open circles. A diagonal line is drawn for reference.