diff --git a/src/uncategorized/BackwardsCompatibility.tw b/src/uncategorized/BackwardsCompatibility.tw
index f0fcfdf3772449c30ef7e71cd5f4b7dca3101f30..11dc01a4d4ab529033830b25c56bd0ff58f44c7e 100644
--- a/src/uncategorized/BackwardsCompatibility.tw
+++ b/src/uncategorized/BackwardsCompatibility.tw
@@ -657,6 +657,9 @@
 <<if ndef $nursery>>
 	<<set $nursery = 0>>
 <</if>>
+<<if ndef $Matron>>
+	<<set $Matron = 0>>
+<</if>>
 
 <<if ndef $farmyard>>
 	<<set $farmyard = 0>>