diff --git a/data/core/terrain.cfg b/data/core/terrain.cfg
index 8967cfbe82d..3fabe3e7de1 100644
--- a/data/core/terrain.cfg
+++ b/data/core/terrain.cfg
@@ -845,7 +845,7 @@
     name= _ "Road"
     editor_name= _ "Dark Flagstones"
     string=Urb
-    editor_group=cave
+    editor_group=cave, flat
     aliasof=Gt
 [/terrain_type]