diff --git a/src/level.cc b/src/level.cc
index ce7750b..1a4ff56 100644
--- a/src/level.cc
+++ b/src/level.cc
@@ -185,6 +185,10 @@ bool level::is_available_all(const position &pos) const {
         if (!map.is_available(pos))
                 return false;
 
+        if (!(enabled_features & FEATURE_DOORS) &&
+            map.which_room(pos) == -1)
+                return false;
+
         if (player->get_pos() == pos)
                 return false;