Uppercases slot defines.

code/datums/martial/boxing.dm

@@ -53,7 +53,7 @@
 /obj/item/clothing/gloves/boxing/equipped(mob/user, slot)
 	if(!ishuman(user))
 		return
-	if(slot == slot_gloves)
+	if(slot == SLOT_GLOVES)
 		var/mob/living/carbon/human/H = user
 		style.teach(H,1)
 	return
@@ -62,6 +62,6 @@
 	if(!ishuman(user))
 		return
 	var/mob/living/carbon/human/H = user
-	if(H.get_item_by_slot(slot_gloves) == src)
+	if(H.get_item_by_slot(SLOT_GLOVES) == src)
 		style.remove(H)
 	return

code/datums/martial/krav_maga.dm

@@ -170,7 +170,7 @@
 /obj/item/clothing/gloves/krav_maga/equipped(mob/user, slot)
 	if(!ishuman(user))
 		return
-	if(slot == slot_gloves)
+	if(slot == SLOT_GLOVES)
 		var/mob/living/carbon/human/H = user
 		style.teach(H,1)
 
@@ -178,7 +178,7 @@
 	if(!ishuman(user))
 		return
 	var/mob/living/carbon/human/H = user
-	if(H.get_item_by_slot(slot_gloves) == src)
+	if(H.get_item_by_slot(SLOT_GLOVES) == src)
 		style.remove(H)
 
 /obj/item/clothing/gloves/krav_maga/sec//more obviously named, given to sec

code/datums/martial/sleeping_carp.dm

@@ -161,7 +161,7 @@
 	desc = "A long, tall staff made of polished wood. Traditionally used in ancient old-Earth martial arts. Can be wielded to both kill and incapacitate."
 	force = 10
 	w_class = WEIGHT_CLASS_BULKY
-	slot_flags = SLOT_BACK
+	slot_flags = ITEM_SLOT_BACK
 	force_unwielded = 10
 	force_wielded = 24
 	throwforce = 20

code/datums/martial/wrestling.dm

@@ -448,7 +448,7 @@
 /obj/item/storage/belt/champion/wrestling/equipped(mob/user, slot)
 	if(!ishuman(user))
 		return
-	if(slot == slot_belt)
+	if(slot == SLOT_BELT)
 		var/mob/living/carbon/human/H = user
 		style.teach(H,1)
 	return
@@ -457,6 +457,6 @@
 	if(!ishuman(user))
 		return
 	var/mob/living/carbon/human/H = user
-	if(H.get_item_by_slot(slot_belt) == src)
+	if(H.get_item_by_slot(SLOT_BELT) == src)
 		style.remove(H)
 	return