diff --git a/Resources/Prototypes/Procedural/dungeon_configs.yml b/Resources/Prototypes/Procedural/dungeon_configs.yml
index b55d5a9e69..d75581bbc2 100644
--- a/Resources/Prototypes/Procedural/dungeon_configs.yml
+++ b/Resources/Prototypes/Procedural/dungeon_configs.yml
@@ -127,6 +127,8 @@
       Junction: BaseAirlock
       WallMounts: ScienceLabsWalls
       Window: BaseWindow
+    tiles:
+      FallbackTile: FloorDark
     whitelists:
       Rooms:
         tags: