diff --git a/code/datums/mutations/combined.dm b/code/datums/mutations/combined.dm
index 5fc9df7550..d3cc83f9c0 100644
--- a/code/datums/mutations/combined.dm
+++ b/code/datums/mutations/combined.dm
@@ -11,10 +11,6 @@
 		if(findtext(A, "[mutation1]") && findtext(A, "[mutation2]"))
 			return GLOB.mutation_recipes[A]
 
-/datum/generecipe/x_ray
-	required = "/datum/mutation/human/thermal; /datum/mutation/human/radioactive"
-	result = /datum/mutation/human/thermal/x_ray
-
 /datum/generecipe/shock
 	required = "/datum/mutation/human/insulated; /datum/mutation/human/radioactive"
 	result = SHOCKTOUCH
@@ -29,4 +25,4 @@
 
 /datum/generecipe/tonguechem
 	required = "/datum/mutation/human/tongue_spike; /datum/mutation/human/stimmed"
-	result = TONGUESPIKECHEM
\ No newline at end of file
+	result = TONGUESPIKECHEM