diff --git a/src/town_gui.cpp b/src/town_gui.cpp
--- a/src/town_gui.cpp
+++ b/src/town_gui.cpp
@@ -480,7 +480,7 @@ public:
 		FOR_ALL_STATIONS(st) {
 			if (st->town == this->town) {
 				/* Non-oil rig stations are always a problem. */
-				if (!(st->facilities & FACIL_AIRPORT) || st->airport_type != AT_OILRIG) return false;
+				if (!(st->facilities & FACIL_AIRPORT) || st->airport.type != AT_OILRIG) return false;
 				/* We can only automatically delete oil rigs *if* there's no vehicle on them. */
 				if (DoCommand(st->airport.tile, 0, 0, DC_NONE, CMD_LANDSCAPE_CLEAR).Failed()) return false;
 			}