diff --git a/code/datums/mutations/radioactive.dm b/code/datums/mutations/radioactive.dm
index b2a17b53412..e7dc2557eb5 100644
--- a/code/datums/mutations/radioactive.dm
+++ b/code/datums/mutations/radioactive.dm
@@ -24,7 +24,8 @@
 
 /datum/mutation/human/radioactive/modify()
 	. = ..()
-	make_radioactive(owner)
+	if(!QDELETED(owner))
+		make_radioactive(owner)
 
 /**
  * Makes the passed mob radioactive, or if they're already radioactive,