diff --git a/code/game/machinery/Sleeper.dm b/code/game/machinery/Sleeper.dm
index a4beccecbb..55976d69c2 100644
--- a/code/game/machinery/Sleeper.dm
+++ b/code/game/machinery/Sleeper.dm
@@ -421,7 +421,8 @@
 	desc = "A large cryogenics unit built from brass. Its surface is pleasantly cool the touch."
 	icon_state = "sleeper_clockwork"
 	enter_message = "<span class='bold inathneq_small'>You hear the gentle hum and click of machinery, and are lulled into a sense of peace.</span>"
-	possible_chems = list(list("epinephrine", "salbutamol", "bicaridine", "kelotane", "oculine", "inacusiate", "mannitol"))
+	possible_chems = list(list(/datum/reagent/medicine/epinephrine, /datum/reagent/medicine/salbutamol, /datum/reagent/medicine/bicaridine,
+	 /datum/reagent/medicine/kelotane, /datum/reagent/medicine/oculine, /datum/reagent/medicine/inacusiate, /datum/reagent/medicine/mannitol))
 
 /obj/machinery/sleeper/clockwork/process()
 	if(occupant && isliving(occupant))