The teenage son of former Manchester City goalkeeper Andy Dibble will be Barnsley's third choice stopper next season.
Christian Dibble, 19, joins the Reds on a one-year deal after leaving League Two Bury. Barnsley have an option to extend the deal next summer.
Dibble is a replacement for Lithuanian under 20 international Lukas Lidakevicius who has left the club after rejecting their offer of a new contract.
Barnsley boss David Flitcroft said of Dibble: "He's got good pedigree, being the son of Andy Dibble, as well as good size. There's a lot of work to do but we think we can make him better, fitter, leaner and more athletic.
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"We signed Andrai Jones from Bury and he played well against Derby and Nottingham Forest."
