diff --git a/src/pg.ml b/src/pg.ml
index a8d7373f..8b3e39f8 100644
--- a/src/pg.ml
+++ b/src/pg.ml
@@ -1,5 +1,6 @@
-(* TODO add dune stanza like for prelude:
-     "(flags (:standard -open Prelude))" *)
+(* TODO be sure to not use postgres ptime
+   add a dune stanza like for prelude:
+   "(flags (:standard -open Prelude))" *)
 module Caqti_type = struct
   include Caqti_type