1 files changed, 1 insertions, 1 deletions
diff --git a/opendc-web/opendc-web-ui/src/components/topologies/map/WallContainer.js b/opendc-web/opendc-web-ui/src/components/topologies/map/WallContainer.js
index 143f70c2..106d8d3d 100644
--- a/opendc-web/opendc-web-ui/src/components/topologies/map/WallContainer.js
+++ b/opendc-web/opendc-web-ui/src/components/topologies/map/WallContainer.js
@@ -27,7 +27,7 @@ import WallGroup from './groups/WallGroup'
 
 function WallContainer({ roomId, ...props }) {
     const tiles = useSelector((state) => {
-        return state.topology.rooms[roomId].tiles.map((tileId) => state.topology.tiles[tileId])
+        return state.topology.rooms[roomId]?.tiles.map((tileId) => state.topology.tiles[tileId]) ?? []
     })
     return <WallGroup {...props} tiles={tiles} />
 }