diff --git a/code/game/events/Events/RadiationBelt.dm b/code/game/events/Events/RadiationBelt.dm
index 3184ff094c8..e377a5d1ad2 100644
--- a/code/game/events/Events/RadiationBelt.dm
+++ b/code/game/events/Events/RadiationBelt.dm
@@ -4,7 +4,7 @@
 		command_alert("The station is now travelling through a radiation belt", "Medical Alert")
 
 	Tick()
-		for(var/mob/living/L in world)
+		for(var/mob/living/carbon/L in world)
 			L.radiation += rand(1,7)
 			if (L && prob(4))
 				if (prob(75))