In the title compound, C(8)H(8)N(2)O, the N-CH(2) and CH(2)-O bond lengths can be correlated to the manifestation of an anomeric effect in the N-CH(2)-O moiety. In the crystal, inter-molecular O-H⋯N hydrogen bonds link the mol-ecules into zigzag chains, with graph-set motif C(6), parallel to [001]. These chains are further linked into sheets by weak nonclassical C-H⋯O hydrogen bonds.