diff --git a/code/game/machinery/teleporter.dm b/code/game/machinery/teleporter.dm
index 2c54b8b793..1f1f13ee22 100644
--- a/code/game/machinery/teleporter.dm
+++ b/code/game/machinery/teleporter.dm
@@ -68,15 +68,16 @@
 	if (ismovableatom(M))
 		if(do_teleport(M, com.target, channel = TELEPORT_CHANNEL_BLUESPACE))
 			use_power(5000)
-			if(!calibrated && prob(30 - ((accurate) * 10))) //oh dear a problem
-				log_game("[M] ([key_name(M)]) was turned into a fly person")
-				if(ishuman(M))//don't remove people from the round randomly you jerks
-					var/mob/living/carbon/human/human = M
-						to_chat(M, "<span class='italics'>You hear a buzzing in your ears.</span>")
-						human.set_species(/datum/species/fly)
 
-					human.apply_effect((rand(120 - accurate * 40, 180 - accurate * 60)), EFFECT_IRRADIATE, 0)
-			calibrated = 0
+			if(!calibrated && iscarbon(M) && prob(30 - ((accurate) * 10))) //oh dear a problem
+				var/mob/living/carbon/C = M
+				if(C.dna?.species && C.dna.species.id != "fly" && !HAS_TRAIT(C, TRAIT_RADIMMUNE))
+					to_chat(C, "<span class='italics'>You hear a buzzing in your ears.</span>")
+					C.set_species(/datum/species/fly)
+					log_game("[C] ([key_name(C)]) was turned into a fly person")
+					C.apply_effect((rand(120 - accurate * 40, 180 - accurate * 60)), EFFECT_IRRADIATE, 0)
+
+			calibrated = FALSE
 	return
 
 /obj/machinery/teleport/hub/update_icon()