In the title compound, C(14)H(16)N(2)O(4)·H(2)O, the dihedral angles between the planes of the 4-hydroxy-phenyl and ester groups with the plane of the six-membered tetra-hydro-pyrimidine ring are 87.3 (1) and 75.9 (1)°, respectively. The crystal structure is stabilized by O-H⋯O and N-H⋯O hydrogen bonding between the water mol-ecule and the organic functionalities.