diff --git a/code/datums/diseases/_disease.dm b/code/datums/diseases/_disease.dm
index f1a7c4a6..940b61c9 100644
--- a/code/datums/diseases/_disease.dm
+++ b/code/datums/diseases/_disease.dm
@@ -30,7 +30,7 @@
 	var/list/required_organs = list()
 	var/needs_all_cures = TRUE
 	var/list/strain_data = list() //dna_spread special bullshit
-	var/list/infectable_biotypes = MOB_ORGANIC //if the disease can spread on organics, synthetics, or undead
+	var/infectable_biotypes = MOB_ORGANIC //if the disease can spread on organics, synthetics, or undead
 	var/process_dead = FALSE //if this ticks while the host is dead
 	var/copy_type = null //if this is null, copies will use the type of the instance being copied