In the title compound, C(18)H(21)N(3)O(2)·H(2)O, the fused-ring system is approximately planar [maximum atomic deviation = 0.028 (3) Å]; the morpholine ring displays a chair conformation. The crystal packing is stabilized by classical inter-molecular O-H⋯O and O-H⋯N hydrogen bonds and weak C-H⋯O hydrogen bonds between the organic mol-ecules and the water mol-ecules.