Euclidean-normalised differential source counts for the GMRT 153 MHz catalogue (filled black circles) in 18 logarithmic flux density bins between 15 mJy and 6.5 Jy. For comparison we have plotted the 153 MHz source counts from Intema et al. (2011) (open squares) for the central Böotes pointing, from Ghosh et al. (2012) (blue filled squares) and from Ishwara-Chandra et al. (2010) (red filled triangles), as well as the 151 MHz source counts from McGilchrist et al. (1990) for part of the 7C catalogue (open inverted triangles). Also shown is a source count model by Wilman et al. (2008) (dotted line with shaded area indicating the 1σ errors) and a power law fitted between 150−400 mJy (dashed line) which has a slope of 0.93 ± 0.04.