diff --git a/src/data/union_room.h b/src/data/union_room.h
index f39ab83de0..42c02c5a58 100644
--- a/src/data/union_room.h
+++ b/src/data/union_room.h
@@ -867,7 +867,8 @@ static const struct WindowTemplate sWindowTemplate_TradingBoardRequestType = {
     .baseBlock = 0x0001
 };
 
-static const struct ListMenuItem sTradingBoardTypes[NUMBER_OF_MON_TYPES] = {
+// Subtract two from the total type count to handle in-battle types not for display
+static const struct ListMenuItem sTradingBoardTypes[NUMBER_OF_MON_TYPES - 2] = {
     { gTypesInfo[TYPE_NORMAL].name,   TYPE_NORMAL         },
     { gTypesInfo[TYPE_FIRE].name,     TYPE_FIRE           },
     { gTypesInfo[TYPE_WATER].name,    TYPE_WATER          },