diff --git a/resources/datomic/ion-config.edn b/resources/datomic/ion-config.edn
index 64fb6b82..7f086271 100644
--- a/resources/datomic/ion-config.edn
+++ b/resources/datomic/ion-config.edn
@@ -7,9 +7,10 @@
             iol-ion.tx/upsert-invoice
             iol-ion.tx/upsert-transaction
             iol-ion.tx/pay
+            iol-ion.tx/plus
+
             iol-ion.query/dollars=
             iol-ion.query/dollars-0?
-
             iol-ion.query/sales-orders-in-range
             iol-ion.query/local-now
             iol-ion.query/localize