The Guiseley man struck virtually at the mid-point of the first half to score the only goal of the game at Boston Town’s DWB Stadium.
The result ended United’s impressive cup run, which had included victories over Chasetown, Solihull Moors and Histon.
Boston (4-4-1-1): Travis Portas; Jack McCallum, Kofi Ross, Daniel Moulds, Bailey Forth (Liam Mead 85); Tinashe Chavundura (James Gordon 60), Harry Vince, Oli Drummond, Peter Evison (Elliot Andrew 65); Jack Dykes; Kemal Yenibertiz. Subs (not used): Sam Partridge, Harry Payne (gk).