diff --git a/code/modules/mapping/mapping_helpers.dm b/code/modules/mapping/mapping_helpers.dm
index bffe486e34f8c..4355ddf6895d6 100644
--- a/code/modules/mapping/mapping_helpers.dm
+++ b/code/modules/mapping/mapping_helpers.dm
@@ -309,7 +309,7 @@ INITIALIZE_IMMEDIATE(/obj/effect/mapping_helpers/no_lava)
 
 /obj/effect/mapping_helpers/dead_body_placer/proc/spawn_dead_human_in_tray(atom/container)
 	var/mob/living/carbon/human/corpse = new(container)
-	var/list/possible_alt_species = GLOB.roundstart_races.Copy() - list(SPECIES_HUMAN, SPECIES_IPC)
+	var/list/possible_alt_species = GLOB.roundstart_races.Copy() - list(SPECIES_HUMAN, SPECIES_IPC, SPECIES_DIONA)
 	if(prob(15) && length(possible_alt_species))
 		corpse.set_species(GLOB.species_list[pick(possible_alt_species)])
 	corpse.give_random_dormant_disease(25, min_symptoms = 1, max_symptoms = 5) // slightly more likely that an average stationgoer to have a dormant disease, bc who KNOWS how they died?