Period distribution of both polars (red line) and non-polar cataclysmic variables (black line and grey histogram) from the SDSS I–IV sample of cataclysmic variables recently published by Inight et al. (2023b). A dearth of systems between 147 and 191 min (light blue shaded region) in the sample of non-polars can clearly be detected. We claim that the reduced number of non-polar cataclysmic variables in this period range represents the (in)famous period gap of cataclysmic variables. The dashed vertical lines indicate the boundaries of the period gap as identified by Knigge et al. (2011), while the upper boundary perfectly fits with what we found here, the lower edge of the period gap in the SDSS I–IV sample seems to be located at longer periods. The period distribution of polars does not show evidence for a reduction in the number of systems in the gap.