diff --git a/code/game/machinery/Sleeper.dm b/code/game/machinery/Sleeper.dm
index b6dc09eb59..a83c3add9f 100644
--- a/code/game/machinery/Sleeper.dm
+++ b/code/game/machinery/Sleeper.dm
@@ -264,7 +264,7 @@
 			if(blood_id)
 				data["occupant"]["blood"] = list() // We can start populating this list.
 				var/blood_type = C.dna.blood_type
-				if(blood_id != "blood") // special blood substance
+				if(!(blood_id in GLOB.blood_reagent_types)) // special blood substance
 					var/datum/reagent/R = GLOB.chemical_reagents_list[blood_id]
 					if(R)
 						blood_type = R.name