We note that mutations in the gene that encodes for cardiac troponin C (TNNC1) have been associated with hypertrophic cardiomyopathy (Liang et al., 2008; Pinto et al., 2009; Parvatiyar et al., 2012), restrictive cardiomyopathy (Parvatiyar et al., 2010), and ventricular fibrillation (Parvatiyar et al., 2012). Here, TNNC1 is linked to restrictive cardiomyopathy.