diff --git a/src/town_cmd.cpp b/src/town_cmd.cpp
--- a/src/town_cmd.cpp
+++ b/src/town_cmd.cpp
@@ -1445,7 +1445,7 @@ static void DoCreateTown(Town *t, TileIn
 	t->larger_town = city;
 
 	int x = (int)size * 16 + 3;
-	if (size == TS_RANDOM) x = (Random() & 0xF) + 8;
+	if (size == TSZ_RANDOM) x = (Random() & 0xF) + 8;
 	/* Don't create huge cities when founding town in-game */
 	if (city && (!manual || _game_mode == GM_EDITOR)) x *= _settings_game.economy.initial_city_size;
 
@@ -1525,13 +1525,13 @@ CommandCost CmdFoundTown(TileIndex tile,
 	bool random = HasBit(p1, 6);
 	uint32 townnameparts = p2;
 
-	if (size > TS_RANDOM) return CMD_ERROR;
+	if (size > TSZ_RANDOM) return CMD_ERROR;
 	if (layout > TL_RANDOM) return CMD_ERROR;
 
 	/* Some things are allowed only in the scenario editor */
 	if (_game_mode != GM_EDITOR) {
 		if (_settings_game.economy.found_town == TF_FORBIDDEN) return CMD_ERROR;
-		if (size == TS_LARGE) return CMD_ERROR;
+		if (size == TSZ_LARGE) return CMD_ERROR;
 		if (random) return CMD_ERROR;
 		if (_settings_game.economy.found_town != TF_CUSTOM_LAYOUT && layout != _settings_game.economy.town_layout) {
 			return CMD_ERROR;
@@ -1555,7 +1555,7 @@ CommandCost CmdFoundTown(TileIndex tile,
 		if (ret.Failed()) return ret;
 	}
 
-	static const byte price_mult[][TS_RANDOM + 1] = {{ 15, 25, 40, 25 }, { 20, 35, 55, 35 }};
+	static const byte price_mult[][TSZ_RANDOM + 1] = {{ 15, 25, 40, 25 }, { 20, 35, 55, 35 }};
 	/* multidimensional arrays have to have defined length of non-first dimension */
 	assert_compile(lengthof(price_mult[0]) == 4);
 
@@ -1782,7 +1782,7 @@ bool GenerateTowns(TownLayout layout)
 		/* Get a unique name for the town. */
 		if (!GenerateTownName(&townnameparts)) continue;
 		/* try 20 times to create a random-sized town for the first loop. */
-		if (CreateRandomTown(20, townnameparts, TS_RANDOM, city, layout) != NULL) num++; // If creation was successful, raise a flag.
+		if (CreateRandomTown(20, townnameparts, TSZ_RANDOM, city, layout) != NULL) num++; // If creation was successful, raise a flag.
 	} while (--n);
 
 	if (num != 0) return true;
@@ -1790,7 +1790,7 @@ bool GenerateTowns(TownLayout layout)
 	/* If num is still zero at this point, it means that not a single town has been created.
 	 * So give it a last try, but now more aggressive */
 	if (GenerateTownName(&townnameparts) &&
-			CreateRandomTown(10000, townnameparts, TS_RANDOM, _settings_game.economy.larger_towns != 0, layout) != NULL) {
+			CreateRandomTown(10000, townnameparts, TSZ_RANDOM, _settings_game.economy.larger_towns != 0, layout) != NULL) {
 		return true;
 	}