Futures with Present Forms.—The following verbs have no future suffix, the future thus having the form of a present: ἔδομαι (ἐδ-) eat, πί_ομαι (πι-)
a. These are probably old subjunctives which have retained their future meaning. In ἔδομαι and πί_ομαι the mood-sign is short ( cross457 D.). Hom. has βέομαι or βείομαι
Herbert Weir Smyth [n.d.], A Greek Grammar for Colleges; Machine readable text [info] [word count] [Smyth].