--- a/aircraft_cmd.c
+++ b/aircraft_cmd.c
@@ -1179,6 +1179,8 @@
 			break;
 
 		case OT_LOADING: return;
+
+		default: break;
 	}
 
 	if (v->cur_order_index >= v->num_orders) v->cur_order_index = 0;

--- a/depot.c
+++ b/depot.c
@@ -79,7 +79,6 @@
  */
 void DoDeleteDepot(TileIndex tile)
 {
-	Order order;
 	Depot *depot;
 
 	/* Get the depot */
@@ -92,9 +91,7 @@
 	depot->xy = 0;
 
 	/* Clear the depot from all order-lists */
-	order.type    = OT_GOTO_DEPOT;
-	order.station = depot->index;
-	DeleteDestinationFromVehicleOrder(order);
+	RemoveOrderFromAllVehicles(OT_GOTO_DEPOT, depot->index);
 
 	/* Delete the depot-window */
 	DeleteWindowById(WC_VEHICLE_DEPOT, tile);

--- a/order.h
+++ b/order.h
@@ -10,7 +10,7 @@
 #include "pool.h"
 
 /* Order types */
-enum {
+typedef enum OrderTypes {
 	OT_NOTHING       = 0,
 	OT_GOTO_STATION  = 1,
 	OT_GOTO_DEPOT    = 2,
@@ -18,7 +18,7 @@
 	OT_LEAVESTATION  = 4,
 	OT_DUMMY         = 5,
 	OT_GOTO_WAYPOINT = 6
-};
+} OrderType;
 
 /* Order flags -- please use OFB instead OF and use HASBIT/SETBIT/CLEARBIT */
 
@@ -77,7 +77,7 @@
  * - REF_SHEDULE (all REFs are currently limited to 16 bits!!)
  */
 typedef struct Order {
-	uint8  type;
+	OrderType type;
 	uint8  flags;
 	StationID station;
 
@@ -162,7 +162,7 @@
 static inline Order UnpackOrder(uint32 packed)
 {
 	Order order;
-	order.type    = GB(packed,  0,  8);
+	order.type    = (OrderType)GB(packed,  0,  8);
 	order.flags   = GB(packed,  8,  8);
 	order.station = GB(packed, 16, 16);
 	order.next    = NULL;
@@ -173,7 +173,7 @@
 /* Functions */
 void BackupVehicleOrders(const Vehicle *v, BackuppedOrders *order);
 void RestoreVehicleOrders(const Vehicle* v, const BackuppedOrders* order);
-void DeleteDestinationFromVehicleOrder(Order dest);
+void RemoveOrderFromAllVehicles(OrderType type, StationID destination);
 void InvalidateVehicleOrder(const Vehicle *v);
 bool VehicleHasDepotOrders(const Vehicle *v);
 void CheckOrders(const Vehicle*);

--- a/order_cmd.c
+++ b/order_cmd.c
@@ -953,13 +953,11 @@
 }
 
 /**
- *
- * Delete a destination (like station, waypoint, ..) from the orders of vehicles
- *
- * @param dest type and station has to be set. This order will be removed from all orders of vehicles
- *
+ * Removes an order from all vehicles. Triggers when, say, a station is removed.
+ * @param type The type of the order (OT_GOTO_[STATION|DEPOT|WAYPOINT]).
+ * @param destination The destination. Can be a StationID, DepotID or WaypointID.
  */
-void DeleteDestinationFromVehicleOrder(Order dest)
+void RemoveOrderFromAllVehicles(OrderType type, StationID destination)
 {
 	Vehicle *v;
 	Order *order;
@@ -970,12 +968,11 @@
 		if (v->orders == NULL) continue;
 
 		/* Forget about this station if this station is removed */
-		if (v->last_station_visited == dest.station && dest.type == OT_GOTO_STATION)
+		if (v->last_station_visited == destination && type == OT_GOTO_STATION)
 			v->last_station_visited = INVALID_STATION;
 
 		/* Check the current order */
-		if (v->current_order.type    == dest.type &&
-				v->current_order.station == dest.station) {
+		if (v->current_order.type == type && v->current_order.station == destination) {
 			/* Mark the order as DUMMY */
 			v->current_order.type = OT_DUMMY;
 			v->current_order.flags = 0;
@@ -985,7 +982,7 @@
 		/* Clear the order from the order-list */
 		need_invalidate = false;
 		FOR_VEHICLE_ORDERS(v, order) {
-			if (order->type == dest.type && order->station == dest.station) {
+			if (order->type == type && order->station == destination) {
 				/* Mark the order as DUMMY */
 				order->type = OT_DUMMY;
 				order->flags = 0;

--- a/order_gui.c
+++ b/order_gui.c
@@ -164,6 +164,8 @@
 					SetDParam(1, (order->flags & OF_NON_STOP) ? STR_GO_NON_STOP_TO_WAYPOINT : STR_GO_TO_WAYPOINT);
 					SetDParam(2, order->station);
 					break;
+
+				default: break;
 			}
 
 			color = (i == WP(w,order_d).sel) ? 0xC : 0x10;

--- a/roadveh_cmd.c
+++ b/roadveh_cmd.c
@@ -631,6 +631,8 @@
 		case OT_LOADING:
 		case OT_LEAVESTATION:
 			return;
+
+		default: break;
 	}
 
 	if (v->cur_order_index >= v->num_orders) v->cur_order_index = 0;

--- a/ship_cmd.c
+++ b/ship_cmd.c
@@ -212,6 +212,8 @@
 		case OT_LOADING:
 		case OT_LEAVESTATION:
 			return;
+
+		default: break;
 	}
 
 	if (v->cur_order_index >= v->num_orders) v->cur_order_index = 0;

--- a/station_cmd.c
+++ b/station_cmd.c
@@ -2399,7 +2399,6 @@
   */
 static void DeleteStation(Station *st)
 {
-	Order order;
 	StationID index;
 	Vehicle *v;
 	st->xy = 0;
@@ -2412,10 +2411,8 @@
 	index = st->index;
 	DeleteWindowById(WC_STATION_VIEW, index);
 
-	//Now delete all orders that go to the station
-	order.type = OT_GOTO_STATION;
-	order.station = index;
-	DeleteDestinationFromVehicleOrder(order);
+	/* Now delete all orders that go to the station */
+	RemoveOrderFromAllVehicles(OT_GOTO_STATION, index);
 
 	//And do the same with aircraft that have the station as a hangar-stop
 	FOR_ALL_VEHICLES(v) {

--- a/train_cmd.c
+++ b/train_cmd.c
@@ -2397,6 +2397,8 @@
 		case OT_LOADING:
 		case OT_LEAVESTATION:
 			return false;
+
+		default: break;
 	}
 
 	// check if we've reached the waypoint?

--- a/waypoint.c
+++ b/waypoint.c
@@ -247,13 +247,9 @@
 /* Internal handler to delete a waypoint */
 static void DoDeleteWaypoint(Waypoint *wp)
 {
-	Order order;
-
 	wp->xy = 0;
 
-	order.type = OT_GOTO_WAYPOINT;
-	order.station = wp->index;
-	DeleteDestinationFromVehicleOrder(order);
+	RemoveOrderFromAllVehicles(OT_GOTO_WAYPOINT, wp->index);
 
 	if (wp->string != STR_NULL) DeleteName(wp->string);