diff --git a/include/constants/form_change_types.h b/include/constants/form_change_types.h
index 11a25d8966f7..654710c1efba 100644
--- a/include/constants/form_change_types.h
+++ b/include/constants/form_change_types.h
@@ -113,7 +113,7 @@
 #define FORM_CHANGE_TIME_OF_DAY                 18
 
 // Form change that depends on a multichoice (e.g. Rotom Catalog).
-// param2: multichoice list (starting at 0).
+// param1: multichoice list (starting at 0).
 #define FORM_CHANGE_ITEM_USE_MULTICHOICE        19
 
 #endif // GUARD_CONSTANTS_FORM_CHANGE_TYPES_H