diff --git a/src/exchange/taler-exchange-httpd_age-withdraw.c b/src/exchange/taler-exchange-httpd_age-withdraw.c
index e7f8b53fc..6e337e5e1 100644
--- a/src/exchange/taler-exchange-httpd_age-withdraw.c
+++ b/src/exchange/taler-exchange-httpd_age-withdraw.c
@@ -91,7 +91,11 @@ free_age_withdraw_context_resources (struct AgeWithdrawContext *awc)
   GNUNET_free (awc->denom_hs);
   GNUNET_free (awc->coin_evs);
   GNUNET_free (awc->commitment.denom_serials);
-  /* commitment.denom_serials and .h_coin_evs are stack allocated */
+  /*
+   * Note:
+   * awc->commitment.denom_sigs and .h_coin_evs were stack allocated and
+   * .denom_pub_hashes is NULL for this context.
+   */
 }
 
 
@@ -420,8 +424,6 @@ are_denominations_valid (
   struct TEH_KeyStateHandle *ksh;
   uint64_t *serials;
 
-  GNUNET_assert (*denom_serials == NULL);
-
   ksh = TEH_keys_get_state ();
   if (NULL == ksh)
   {
diff --git a/src/include/taler_exchangedb_plugin.h b/src/include/taler_exchangedb_plugin.h
index 169359073..fb8bb2894 100644
--- a/src/include/taler_exchangedb_plugin.h
+++ b/src/include/taler_exchangedb_plugin.h
@@ -1245,7 +1245,7 @@ struct TALER_EXCHANGEDB_AgeWithdraw
   uint64_t *denom_serials;
 
   /**
-   * Array of @a num_coins hashes of the public keys of the denominations
+   * [out]-Array of @a num_coins hashes of the public keys of the denominations
    * identified by @e denom_serials.  This field is set when calling
    * get_age_withdraw
    */