We wish to correct a typo in ATel #17856 in the quoted flux of the marginal emission feature near 6680 Angstrom in the GTC/OSIRIS spectrum of the faint irregular galaxy candidate. The flux of the tentative feature should read ~6 x 10^-18 erg s^-1 cm^-2, rather than ~6 x 10^-17 erg s^-1 cm^-2 as reported in the original telegram. This correction does not affect any of the conclusions presented in ATel #17856.
