diff --git a/rail_cmd.c b/rail_cmd.c
--- a/rail_cmd.c
+++ b/rail_cmd.c
@@ -2167,7 +2167,7 @@ static void ChangeTileOwner_Track(TileIn
 {
 	if (!IsTileOwner(tile, old_player)) return;
 
-	if (new_player != 255) {
+	if (new_player != OWNER_SPECTATOR) {
 		SetTileOwner(tile, new_player);
 	}	else {
 		DoCommandByTile(tile, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR);
diff --git a/road_cmd.c b/road_cmd.c
--- a/road_cmd.c
+++ b/road_cmd.c
@@ -1196,7 +1196,7 @@ static void ChangeTileOwner_Road(TileInd
 
 	if (!IsTileOwner(tile, old_player)) return;
 
-	if (new_player != 255) {
+	if (new_player != OWNER_SPECTATOR) {
 		SetTileOwner(tile, new_player);
 	}	else {
 		if (GB(_m[tile].m5, 4, 4) == 0) {
diff --git a/station_cmd.c b/station_cmd.c
--- a/station_cmd.c
+++ b/station_cmd.c
@@ -2952,7 +2952,7 @@ static void ChangeTileOwner_Station(Tile
 {
 	if (!IsTileOwner(tile, old_player)) return;
 
-	if (new_player != 255) {
+	if (new_player != OWNER_SPECTATOR) {
 		Station *st = GetStation(_m[tile].m2);
 		SetTileOwner(tile, new_player);
 		st->owner = new_player;
diff --git a/tunnelbridge_cmd.c b/tunnelbridge_cmd.c
--- a/tunnelbridge_cmd.c
+++ b/tunnelbridge_cmd.c
@@ -1412,7 +1412,7 @@ static void ChangeTileOwner_TunnelBridge
 {
 	if (!IsTileOwner(tile, old_player)) return;
 
-	if (new_player != 255) {
+	if (new_player != OWNER_SPECTATOR) {
 		SetTileOwner(tile, new_player);
 	}	else {
 		if((_m[tile].m5 & 0xC0)==0xC0) {
diff --git a/unmovable_cmd.c b/unmovable_cmd.c
--- a/unmovable_cmd.c
+++ b/unmovable_cmd.c
@@ -389,7 +389,7 @@ static void ChangeTileOwner_Unmovable(Ti
 {
 	if (!IsTileOwner(tile, old_player)) return;
 
-	if (_m[tile].m5==3 && new_player != 255) {
+	if (_m[tile].m5 == 3 && new_player != OWNER_SPECTATOR) {
 		SetTileOwner(tile, new_player);
 	} else {
 		DoClearSquare(tile);
diff --git a/water_cmd.c b/water_cmd.c
--- a/water_cmd.c
+++ b/water_cmd.c
@@ -697,7 +697,7 @@ static void ChangeTileOwner_Water(TileIn
 {
 	if (!IsTileOwner(tile, old_player)) return;
 
-	if (new_player != 255) {
+	if (new_player != OWNER_SPECTATOR) {
 		SetTileOwner(tile, new_player);
 	} else {
 		DoCommandByTile(tile, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR);