diff --git a/code/modules/mob/living/carbon/human/life.dm b/code/modules/mob/living/carbon/human/life.dm
index 74844fd3b12..b5db5a83d93 100644
--- a/code/modules/mob/living/carbon/human/life.dm
+++ b/code/modules/mob/living/carbon/human/life.dm
@@ -687,6 +687,8 @@
 /mob/living/carbon/human/proc/stabilize_body_temperature()
 	if (species.passive_temp_gain) // We produce heat naturally.
 		bodytemperature += species.passive_temp_gain
+	if (species.body_temperature == null)
+		return //this species doesn't have metabolic thermoregulation
 
 	var/body_temperature_difference = species.body_temperature - bodytemperature
 
diff --git a/code/modules/mob/living/carbon/human/species/station/station.dm b/code/modules/mob/living/carbon/human/species/station/station.dm
index b63dd51963f..47783470a47 100644
--- a/code/modules/mob/living/carbon/human/species/station/station.dm
+++ b/code/modules/mob/living/carbon/human/species/station/station.dm
@@ -270,6 +270,7 @@
 	heat_level_2 = 1000
 	heat_level_3 = 2000
 
+	body_temperature = null
 	passive_temp_gain = 10  // This should cause IPCs to stabilize at ~80 C in a 20 C environment.
 
 	flags = CAN_JOIN | IS_WHITELISTED | NO_BREATHE | NO_SCAN | NO_BLOOD | NO_PAIN | NO_POISON