diff --git a/data/json/furniture_and_terrain/terrain-doors.json b/data/json/furniture_and_terrain/terrain-doors.json
index 230f9940687d6..eac05445ffa89 100644
--- a/data/json/furniture_and_terrain/terrain-doors.json
+++ b/data/json/furniture_and_terrain/terrain-doors.json
@@ -2453,7 +2453,7 @@
     "move_cost": 1,
     "coverage": 95,
     "roof": "t_metal_flat_roof",
-    "flags": [ "CONNECT_TO_WALL" ],
+    "flags": [ "CONNECT_TO_WALL", "FLAT", "ROAD" ],
     "close": "t_door_metal_bulkhead_c",
     "bash": {
       "str_min": 80,