Summary: In the main features there is not much difference between the annual course of the thunderstorm frequency in Hungary obtained from the data of the years 1968-77 and the results published by E. Héjas nearly a hundred years ago (see Figs. 1, 2 and 3). It seems that the recent data are more reliable, as if the subjective error of present-day "thunderstorm measurement" is less than the earlier one taken 100 years ago. Perhaps this may be the reason for the fact that I found a small local maximum about the 33rd decade. E. Héjas's conclusion that "the maximum of thunderstorm frequency precedes the maximum of temperature in July" is not proved in the light of the 1968-77 data.