diff --git a/sys/dev/dkwedge/dk.c b/sys/dev/dkwedge/dk.c
index 1884ce1b2ff6..7dbf20a2cfe7 100644
--- a/sys/dev/dkwedge/dk.c
+++ b/sys/dev/dkwedge/dk.c
@@ -589,6 +589,7 @@ dkwedge_cleanup_parent(struct dkwedge_softc *sc, int flags)
 	}  else {
 		mutex_enter(&sc->sc_parent->dk_rawlock);
 		dklastclose(sc);
+		dk->dk_openmask = 0;
 		mutex_exit(&sc->sc_parent->dk_rawlock);
 	}
 	mutex_exit(&sc->sc_dk.dk_openlock);