Here I fix a few issues.

code/modules/keybindings/keybind/human.dm

@@ -5,17 +5,6 @@
 /datum/keybinding/human/can_use(client/user)
 	return ishuman(user.mob)
 
-/datum/keybinding/human/quick_equip
-	hotkey_keys = list("E")
-	name = "quick_equip"
-	full_name = "Quick Equip"
-	description = "Quickly puts an item in the best slot available"
-
-/datum/keybinding/human/quick_equip/down(client/user)
-	var/mob/living/carbon/human/H = user.mob
-	H.quick_equip()
-	return TRUE
-
 /datum/keybinding/human/quick_equipbelt
 	hotkey_keys = list("ShiftE")
 	name = "quick_equipbelt"

code/modules/keybindings/keybind/living.dm

@@ -5,6 +5,17 @@
 /datum/keybinding/living/can_use(client/user)
 	return isliving(user.mob)
 
+/datum/keybinding/living/quick_equip
+	hotkey_keys = list("E")
+	name = "quick_equip"
+	full_name = "Quick Equip"
+	description = "Quickly puts an item in the best slot available"
+
+/datum/keybinding/living/quick_equip/down(client/user)
+	var/mob/living/carbon/human/H = user.mob
+	H.quick_equip()
+	return TRUE
+
 /datum/keybinding/living/resist
 	hotkey_keys = list("B")
 	name = "resist"