diff --git a/src/engine/business-core.i b/src/engine/business-core.i
index a2c625b226..9da9116e2e 100644
--- a/src/engine/business-core.i
+++ b/src/engine/business-core.i
@@ -160,6 +160,7 @@ GLIST_HELPER_INOUT(OwnerList, SWIGTYPE_p__gncOwner);
     SET_ENUM("INVOICE-FROM-TXN");
     SET_ENUM("INVOICE-FROM-LOT");
     SET_ENUM("INVOICE-OWNER");
+    SET_ENUM("INVOICE-BILLTO");
     SET_ENUM("OWNER-PARENTG");
     SET_ENUM("OWNER-FROM-LOT");