diff --git a/src/town_cmd.cpp b/src/town_cmd.cpp
--- a/src/town_cmd.cpp
+++ b/src/town_cmd.cpp
@@ -2883,8 +2883,7 @@ CommandCost CmdDeleteTown(TileIndex tile
 	}
 
 	/* Depots refer to towns. */
-	const Depot *d;
-	FOR_ALL_DEPOTS(d) {
+	for (const Depot *d : Depot::Iterate()) {
 		if (d->town == t) return CMD_ERROR;
 	}