diff --git a/src/pg.ml b/src/pg.ml
index feda504c..2f2d5632 100644
--- a/src/pg.ml
+++ b/src/pg.ml
@@ -15,6 +15,7 @@ module Caqti_type = struct
     custom
       ~encode:(fun amount -> Ok (amount.value, amount.fraction))
       ~decode:(fun (value, fraction) ->
+        Fmt.epr "amount decode {value = %Ld; fract = %ld}" value fraction;
         Amount.make ~sign:None ~currency:Config.currency ~value ~fraction)
       (t2 int64 int32)
 
@@ -110,9 +111,11 @@ let lookup_denomination_key =
     Caqti_type.(
       denomination_hash
       ->? t10 time time time time amount amount amount amount amount age_mask)
-      "SELECT valid_from, expire_withdraw, expire_deposit, expire_legal, coin, \
-       fee_withdraw, fee_deposit, fee_refresh, fee_refund, age_mask FROM \
-       denominations WHERE denom_pub_hash=$1"
+      "SELECT valid_from, expire_withdraw, expire_deposit, expire_legal, \
+       coin::taler_amount, fee_withdraw::taler_amount, \
+       fee_deposit::taler_amount, fee_refresh::taler_amount, \
+       fee_refund::taler_amount, age_mask FROM denominations WHERE \
+       denom_pub_hash=$1"
   in
   fun (module Conn : CONN) (h_denom_pub : DenominationHash.t) ->
     Conn.find_opt lookup_denomination_key h_denom_pub