diff --git a/src/pg.ml b/src/pg.ml
index a90846b3..1c18fb21 100644
--- a/src/pg.ml
+++ b/src/pg.ml
@@ -37,6 +37,7 @@ let preflight =
   in
   fun (module Conn : CONN) -> Syntax.list_iter (fun p -> Conn.exec p ()) l
 
+(* TODO revoked_sig *)
 let find_signkey =
   let find_signkey =
     Caqti_type.(eddsa_pub ->? signkey_data)