diff --git a/src/mintdb/plugin_mintdb_postgres.c b/src/mintdb/plugin_mintdb_postgres.c
index 38ce45eb9..922feb5d0 100644
--- a/src/mintdb/plugin_mintdb_postgres.c
+++ b/src/mintdb/plugin_mintdb_postgres.c
@@ -451,8 +451,8 @@ postgres_create_tables (void *cls,
   /* Table for the tracking API, mapping from wire transfer identifiers
      to transactions and back */
   SQLEXEC("CREATE TABLE IF NOT EXISTS aggregation_tracking "
-          "(h_contract BYTEA PRIMARY KEY CHECK (LENGTH(h_contract)=64)"
-          ",h_wire BYTEA PRIMARY KEY CHECK (LENGTH(h_wire)=64)"
+          "(h_contract BYTEA CHECK (LENGTH(h_contract)=64)"
+          ",h_wire BYTEA CHECK (LENGTH(h_wire)=64)"
           ",coin_pub BYTEA NOT NULL CHECK (LENGTH(coin_pub)=32)"
           ",merchant_pub BYTEA NOT NULL CHECK (LENGTH(merchant_pub)=32)"
           ",transaction_id INT8 NOT NULL"
@@ -461,9 +461,12 @@ postgres_create_tables (void *cls,
           ",coin_amount_val INT8 NOT NULL"
           ",coin_amount_frac INT4 NOT NULL"
           ",coin_amount_curr VARCHAR("TALER_CURRENCY_LEN_STR") NOT NULL"
-          ",transaction_total_val INT8 NOT NULL"
-          ",transaction_total_frac INT4 NOT NULL"
-          ",transaction_total_curr VARCHAR("TALER_CURRENCY_LEN_STR") NOT NULL"
+          ",coin_fee_val INT8 NOT NULL"
+          ",coin_fee_frac INT4 NOT NULL"
+          ",coin_fee_curr VARCHAR("TALER_CURRENCY_LEN_STR") NOT NULL"
+          ",transfer_total_val INT8 NOT NULL"
+          ",transfer_total_frac INT4 NOT NULL"
+          ",transfer_total_curr VARCHAR("TALER_CURRENCY_LEN_STR") NOT NULL"
           ")");
   /* Index for lookup_transactions statement on wtid */
   SQLEXEC_INDEX("CREATE INDEX aggregation_tracking_wtid_index "
diff --git a/src/mintdb/test_mintdb.c b/src/mintdb/test_mintdb.c
index 0cd660a4d..8be858c23 100644
--- a/src/mintdb/test_mintdb.c
+++ b/src/mintdb/test_mintdb.c
@@ -1,6 +1,6 @@
 /*
   This file is part of TALER
-  Copyright (C) 2014, 2015 GNUnet e.V.
+  Copyright (C) 2014, 2015, 2016 GNUnet e.V.
 
   TALER is free software; you can redistribute it and/or modify it under the
   terms of the GNU General Public License as published by the Free Software
@@ -305,8 +305,10 @@ test_melting (struct TALER_MINTDB_Session *session)
   RND_BLK (&refresh_session);
   RND_BLK (&session_hash);
   melts = NULL;
+  dkp = NULL;
   new_dkp = NULL;
   new_denom_pubs = NULL;
+  ret_denom_pubs = NULL;
   /* create and test a refresh session */
   refresh_session.num_oldcoins = MELT_OLD_COINS;
   refresh_session.num_newcoins = 1;
@@ -324,11 +326,11 @@ test_melting (struct TALER_MINTDB_Session *session)
                        sizeof (refresh_session)));
 
   /* create a denomination (value: 1; fraction: 100) */
-  dkp = create_denom_key_pair(512, session,
-                              &value,
-                              &fee_withdraw,
-                              &fee_deposit,
-                              &fee_refresh);
+  dkp = create_denom_key_pair (512, session,
+                               &value,
+                               &fee_withdraw,
+                               &fee_deposit,
+                               &fee_refresh);
   /* create MELT_OLD_COINS number of refresh melts */
   melts = GNUNET_new_array (MELT_OLD_COINS, struct TALER_MINTDB_RefreshMelt);
   for (cnt=0; cnt < MELT_OLD_COINS; cnt++)
@@ -416,7 +418,8 @@ test_melting (struct TALER_MINTDB_Session *session)
   ret = GNUNET_OK;
 
  drop:
-  destroy_denom_key_pair (dkp);
+  if (NULL != dkp)
+    destroy_denom_key_pair (dkp);
   if (NULL != melts)
   {
     for (cnt = 0; cnt < MELT_OLD_COINS; cnt++)