diff --git a/code/game/objects/items/weapons/surgery_tools.dm b/code/game/objects/items/weapons/surgery_tools.dm
index 3138a78bdef..3c728523eca 100644
--- a/code/game/objects/items/weapons/surgery_tools.dm
+++ b/code/game/objects/items/weapons/surgery_tools.dm
@@ -188,7 +188,6 @@
 						M:appendix_op_stage = 6.0
 						for(var/datum/disease/appendicitis in M.viruses)
 							appendicitis.cure()
-							M.resistances += appendicitis.type
 		return
 
 	if (user.zone_sel.selecting == "eyes")