diff --git a/wwr_ui/inventory.py b/wwr_ui/inventory.py
index 6b484f23..b2125517 100644
--- a/wwr_ui/inventory.py
+++ b/wwr_ui/inventory.py
@@ -39,7 +39,7 @@
   ["ET Dungeon Map", "ET Compass"] + \
   ["WT Dungeon Map", "WT Compass"]
 
-REGULAR_ITEMS = REGULAR_ITEMS + DUNGEON_NONPROGRESS_ITEMS
+REGULAR_ITEMS += DUNGEON_NONPROGRESS_ITEMS
 REGULAR_ITEMS.sort()
 
 PROGRESSIVE_ITEMS = \