GNAT1 and retinitis pigmentosa 1: Recently, homozygous truncating GNAT1 changes (p.Cys321* and p.Gln302*) were identified in two sporadic patients with rod‐cone dystrophy (Carrigan, Duignan, Humphries, et al., 2016; Méjécase et al., 2016). In our work, a homozygous frameshifting variant was demonstrated in a RP familial case, confirming that truncating defects in GNAT1 results in the more severe rod‐cone dystrophy phenotype and providing the first description of a familial GNAT1‐linked RP case.