diff --git a/code/modules/surgery/other.dm b/code/modules/surgery/other.dm
index 721f124e4e..82c6ad543c 100644
--- a/code/modules/surgery/other.dm
+++ b/code/modules/surgery/other.dm
@@ -27,7 +27,7 @@
 			internal_bleeding = 1
 			break
 
-		return affected.open >= 2 && internal_bleeding
+		return affected.open == (affected.encased ? 3 : 2) && internal_bleeding
 
 	begin_step(mob/user, mob/living/carbon/human/target, target_zone, obj/item/tool)
 		var/obj/item/organ/external/affected = target.get_organ(target_zone)
@@ -206,4 +206,4 @@
 
 	fail_step(mob/living/user, mob/living/carbon/human/target, target_zone, obj/item/tool)
 		user.visible_message("<span class='danger'>[user]'s [tool] can't quite seem to get through the metal...</span>", \
-		"<span class='danger'>Your [tool] can't quite seem to get through the metal. It's weakening, though - try again.</span>")
\ No newline at end of file
+		"<span class='danger'>Your [tool] can't quite seem to get through the metal. It's weakening, though - try again.</span>")