diff --git a/src/town_cmd.cpp b/src/town_cmd.cpp
--- a/src/town_cmd.cpp
+++ b/src/town_cmd.cpp
@@ -2419,7 +2419,7 @@ CommandCost CmdDeleteTown(TileIndex tile
 							try_clear = true;
 						} else {
 							/* Tell to find a new town. */
-							o->town = NULL;
+							if (flags & DC_EXEC) o->town = NULL;
 						}
 					}
 				}