diff --git a/squirrelbattle/game.py b/squirrelbattle/game.py
index 7e5874c..fb10404 100644
--- a/squirrelbattle/game.py
+++ b/squirrelbattle/game.py
@@ -343,6 +343,8 @@ class Game:
         try:
             self.map_index = d["map_index"]
             self.maps = [Map().load_state(map_dict) for map_dict in d["maps"]]
+            for i, m in enumerate(self.maps):
+                m.floor = i
         except KeyError:
             self.message = _("Some keys are missing in your save file.\n"
                              "Your save seems to be corrupt. It got deleted.")