diff --git a/src/pg.ml b/src/pg.ml
index 31c67d71..86225798 100644
--- a/src/pg.ml
+++ b/src/pg.ml
@@ -1,5 +1,6 @@
 (* TODO
    how to fix postgres/caqti tuple type?
+   try something with OID?
    need to add boilerplate in each query for amounts *)
 
 open Crypto