diff --git a/src/carte.py b/src/carte.py
index 5ef8f79..5b491b6 100644
--- a/src/carte.py
+++ b/src/carte.py
@@ -9,6 +9,7 @@ class Tile(IntEnum):
     GSD = 4 # ghost door
     TPT = 5 # teleporter tile
     FIT = 6 # fully inaccessible tile
+    # ghost-cell ground as FIT ? verify no pac-dot here
 
 class Map:
     """