diff --git a/Main.py b/Main.py
index df009b76..c2113094 100644
--- a/Main.py
+++ b/Main.py
@@ -487,6 +487,7 @@ def copy_world(world):
     ret.shufflepots = world.shufflepots.copy()
     ret.shuffle_prizes = world.shuffle_prizes.copy()
     ret.shop_shuffle =  world.shop_shuffle.copy()
+    ret.shop_shuffle_slots = world.shop_shuffle_slots.copy()
     ret.dark_room_logic = world.dark_room_logic.copy()
     ret.restrict_dungeon_item_on_boss = world.restrict_dungeon_item_on_boss.copy()