diff --git a/code/modules/reagents/chemistry/machinery/pandemic.dm b/code/modules/reagents/chemistry/machinery/pandemic.dm
index 9400d3317f..466aa047ad 100644
--- a/code/modules/reagents/chemistry/machinery/pandemic.dm
+++ b/code/modules/reagents/chemistry/machinery/pandemic.dm
@@ -199,7 +199,7 @@
 			var/datum/disease/D = SSdisease.archive_diseases[id]
 			var/obj/item/reagent_containers/glass/bottle/B = new(drop_location())
 			B.name = "[D.name] vaccine bottle"
-			B.reagents.add_reagent("vaccine", 15, list(index))
+			B.reagents.add_reagent("vaccine", 15, list(id))
 			wait = TRUE
 			update_icon()
 			addtimer(CALLBACK(src, .proc/reset_replicator_cooldown), 200)