diff --git a/include/item_use.h b/include/item_use.h
index 8e28a4229c..52b07cd265 100644
--- a/include/item_use.h
+++ b/include/item_use.h
@@ -33,4 +33,11 @@ void Task_UseDigEscapeRopeOnField(u8 taskId);
 bool8 CanUseDigOrEscapeRopeOnCurMap(void);
 u8 CheckIfItemIsTMHMOrEvolutionStone(u16 itemId);
 
+enum ItemTMHMOrEvolutionStone
+{
+    ITEM_IS_OTHER,
+    ITEM_IS_TM_HM,
+    ITEM_IS_EVOLUTION_STONE,
+};
+
 #endif // GUARD_ITEM_USE_H
diff --git a/src/item_use.c b/src/item_use.c
index b7bf458a99..be09493f46 100755
--- a/src/item_use.c
+++ b/src/item_use.c
@@ -176,11 +176,11 @@ static void Task_CloseCantUseKeyItemMessage(u8 taskId)
 u8 CheckIfItemIsTMHMOrEvolutionStone(u16 itemId)
 {
     if (GetItemFieldFunc(itemId) == ItemUseOutOfBattle_TMHM)
-        return 1;
+        return ITEM_IS_TM_HM;
     else if (GetItemFieldFunc(itemId) == ItemUseOutOfBattle_EvolutionStone)
-        return 2;
+        return ITEM_IS_EVOLUTION_STONE;
     else
-        return 0;
+        return ITEM_IS_OTHER;
 }
 
 // Mail in the bag menu can't have a message but it can be checked (view the mail background, no message)
diff --git a/src/party_menu.c b/src/party_menu.c
index 7cde1a018c..1ba9051c6c 100755
--- a/src/party_menu.c
+++ b/src/party_menu.c
@@ -987,10 +987,10 @@ static bool8 DisplayPartyPokemonDataForMoveTutorOrEvolutionItem(u8 slot)
         {
         default:
             return FALSE;
-        case 1: // TM/HM
+        case ITEM_IS_TM_HM:
             DisplayPartyPokemonDataToTeachMove(slot, item, 0);
             break;
-        case 2: // Evolution stone
+        case ITEM_IS_EVOLUTION_STONE:
             if (!GetMonData(currentPokemon, MON_DATA_IS_EGG) && GetEvolutionTargetSpecies(currentPokemon, EVO_MODE_ITEM_CHECK, item) != SPECIES_NONE)
                 return FALSE;
             DisplayPartyPokemonDescriptionData(slot, PARTYBOX_DESC_NO_USE);