diff --git a/src/uncategorized/BackwardsCompatibility.tw b/src/uncategorized/BackwardsCompatibility.tw
index bdb45c0fb8dbd386c9c4aff7c3c5fc57447296d8..0b116f26af6d9b1b7167ce197d77a95ef84e4c46 100644
--- a/src/uncategorized/BackwardsCompatibility.tw
+++ b/src/uncategorized/BackwardsCompatibility.tw
@@ -98,6 +98,26 @@
 	<<set $scarDesign = {primary: "generic", local: "generic"}>>
 <</if>>
 
+<<if !$customSlave.hasOwnProperty("leg")>>
+	<<if def $customSlave.amp && $customSlave.amp === 1>>
+		<<set $customSlave.leg = {left: null, right: null}>>
+	<<else>>
+		<<set $customSlave.leg = {left: new App.Entity.LimbState(), right: new App.Entity.LimbState()}>>
+	<</if>>
+<</if>>
+
+<<if !$customSlave.hasOwnProperty("arm")>>
+	<<if def $customSlave.amp && $customSlave.amp === 1>>
+		<<set $customSlave.arm = {left: null, right: null}>>
+	<<else>>
+		<<set $customSlave.arm = {left: new App.Entity.LimbState(), right: new App.Entity.LimbState()}>>
+	<</if>>
+<</if>>
+
+<<if $customSlave.hasOwnProperty("amp")>>
+	<<run delete $customSlave.amp>>
+<</if>>
+
 <<if !$customSlave.hasOwnProperty("skill")>>
 	<<set $customSlave.skill = {whore: 15, combat: 0}>>
 <</if>>