diff --git a/aircraft_cmd.c b/aircraft_cmd.c
index 46e06f417a..9f65f72e3a 100644
--- a/aircraft_cmd.c
+++ b/aircraft_cmd.c
@@ -207,7 +207,7 @@ int32 CmdBuildAircraft(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
 	const AirportFTAClass* ap;
 	Engine *e;
 
-	if (!IsEngineBuildable(p1, VEH_Aircraft)) return_cmd_error(STR_ENGINE_NOT_BUILDABLE);
+	if (!IsEngineBuildable(p1, VEH_Aircraft, _current_player)) return_cmd_error(STR_ENGINE_NOT_BUILDABLE);
 
 	value = EstimateAircraftCost(p1);
 
diff --git a/build_vehicle_gui.c b/build_vehicle_gui.c
index 1f26391290..ce6ba8c0f3 100644
--- a/build_vehicle_gui.c
+++ b/build_vehicle_gui.c
@@ -290,7 +290,7 @@ static void GenerateBuildAircraftList(Window *w)
 	 * when planes become obsolete and are removed */
 	sel_id = INVALID_ENGINE;
 	for (eid = AIRCRAFT_ENGINES_INDEX; eid < AIRCRAFT_ENGINES_INDEX + NUM_AIRCRAFT_ENGINES; eid++) {
-		if (IsEngineBuildable(eid, VEH_Aircraft)) {
+		if (IsEngineBuildable(eid, VEH_Aircraft, _local_player)) {
 			const AircraftVehicleInfo *avi = AircraftVehInfo(eid);
 			switch (bv->filter.acc_planes) {
 				case HELICOPTERS_ONLY:
diff --git a/engine.c b/engine.c
index f2f903af33..d6acd5d05e 100644
--- a/engine.c
+++ b/engine.c
@@ -401,12 +401,13 @@ int32 CmdRenameEngine(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
 
 /*
  * returns true if an engine is valid, of the specified type, and buildable by
- * the current player, false otherwise
+ * the given player, false otherwise
  *
  * engine = index of the engine to check
  * type   = the type the engine should be of (VEH_xxx)
+ * player = index of the player
  */
-bool IsEngineBuildable(uint engine, byte type)
+bool IsEngineBuildable(EngineID engine, byte type, PlayerID player)
 {
 	const Engine *e;
 
@@ -419,7 +420,7 @@ bool IsEngineBuildable(uint engine, byte type)
 	if (e->type != type) return false;
 
 	// check if it's available
-	if (!HASBIT(e->player_avail, _current_player)) return false;
+	if (!HASBIT(e->player_avail, player)) return false;
 
 	return true;
 }
diff --git a/engine.h b/engine.h
index ddf0abc95d..9675ca396d 100644
--- a/engine.h
+++ b/engine.h
@@ -137,7 +137,7 @@ void DrawAircraftEngine(int x, int y, EngineID engine, uint32 image_ormod);
 void LoadCustomEngineNames(void);
 void DeleteCustomEngineNames(void);
 
-bool IsEngineBuildable(uint engine, byte type);
+bool IsEngineBuildable(EngineID engine, byte type, PlayerID player);
 
 enum {
 	NUM_NORMAL_RAIL_ENGINES = 54,
diff --git a/roadveh_cmd.c b/roadveh_cmd.c
index 3a29ff3cd0..d9e3655084 100644
--- a/roadveh_cmd.c
+++ b/roadveh_cmd.c
@@ -114,7 +114,7 @@ int32 CmdBuildRoadVeh(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
 	UnitID unit_num;
 	Engine *e;
 
-	if (!IsEngineBuildable(p1, VEH_Road)) return_cmd_error(STR_ENGINE_NOT_BUILDABLE);
+	if (!IsEngineBuildable(p1, VEH_Road, _current_player)) return_cmd_error(STR_ENGINE_NOT_BUILDABLE);
 
 	SET_EXPENSES_TYPE(EXPENSES_NEW_VEHICLES);
 
diff --git a/ship_cmd.c b/ship_cmd.c
index e25ec54251..b81ee457f1 100644
--- a/ship_cmd.c
+++ b/ship_cmd.c
@@ -814,7 +814,7 @@ int32 CmdBuildShip(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
 	UnitID unit_num;
 	Engine *e;
 
-	if (!IsEngineBuildable(p1, VEH_Ship)) return_cmd_error(STR_ENGINE_NOT_BUILDABLE);
+	if (!IsEngineBuildable(p1, VEH_Ship, _current_player)) return_cmd_error(STR_ENGINE_NOT_BUILDABLE);
 
 	SET_EXPENSES_TYPE(EXPENSES_NEW_VEHICLES);
 
diff --git a/train_cmd.c b/train_cmd.c
index 65154de6b0..76ea710cdb 100644
--- a/train_cmd.c
+++ b/train_cmd.c
@@ -743,7 +743,7 @@ int32 CmdBuildRailVehicle(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
 	uint num_vehicles;
 
 	/* Check if the engine-type is valid (for the player) */
-	if (!IsEngineBuildable(p1, VEH_Train)) return_cmd_error(STR_ENGINE_NOT_BUILDABLE);
+	if (!IsEngineBuildable(p1, VEH_Train, _current_player)) return_cmd_error(STR_ENGINE_NOT_BUILDABLE);
 
 	/* Check if the train is actually being built in a depot belonging
 	 * to the player. Doesn't matter if only the cost is queried */
diff --git a/train_gui.c b/train_gui.c
index 69f27665ed..8acef37063 100644
--- a/train_gui.c
+++ b/train_gui.c
@@ -393,7 +393,7 @@ static void GenerateBuildList(Window *w)
 		const RailVehicleInfo *rvi = RailVehInfo(eid);
 
 		if (bv->filter.railtype != RAILTYPE_END && !HasPowerOnRail(e->railtype, bv->filter.railtype)) continue;
-		if (!IsEngineBuildable(eid, VEH_Train)) continue;
+		if (!IsEngineBuildable(eid, VEH_Train, _local_player)) continue;
 
 		EngList_Add(&bv->eng_list, eid);
 		if ((rvi->flags & RVI_WAGON) == 0) {