diff --git a/src/ship.h b/src/ship.h
--- a/src/ship.h
+++ b/src/ship.h
@@ -45,7 +45,8 @@ struct Ship FINAL : public SpecializedVe
 	Money GetRunningCost() const override;
 	bool IsInDepot() const override { return this->state == TRACK_BIT_DEPOT; }
 	bool Tick() override;
-	void OnNewDay() override;
+	void OnNewCalendarDay() override;
+	void OnNewEconomyDay() override;
 	Trackdir GetVehicleTrackdir() const override;
 	TileIndex GetOrderStationLocation(StationID station) override;
 	ClosestDepot FindClosestDepot() override;