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-rw-r--r--include/constants/items.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/include/constants/items.h b/include/constants/items.h
index 71338da8e..8f77e80de 100644
--- a/include/constants/items.h
+++ b/include/constants/items.h
@@ -495,7 +495,9 @@
#define NUM_ROUTE_114_MAN_BERRIES (LAST_ROUTE_114_MAN_BERRY - FIRST_ROUTE_114_MAN_BERRY + 1)
#define NUM_ROUTE_114_MAN_BERRIES_SKIPPED (FIRST_ROUTE_114_MAN_BERRY - FIRST_BERRY_INDEX)
-#define ITEM_TO_BERRY(itemId)(((itemId - FIRST_BERRY_INDEX) + 1))
+#define ITEM_TO_BERRY(itemId)(((itemId) - FIRST_BERRY_INDEX) + 1)
+#define ITEM_TO_MAIL(itemId)((itemId) - FIRST_MAIL_INDEX)
+#define MAIL_NONE 0xFF
#define NUM_TECHNICAL_MACHINES 50
#define NUM_HIDDEN_MACHINES 8