diff --git a/src/include/taler_mintdb_plugin.h b/src/include/taler_mintdb_plugin.h
index 63dacf73b..b7dc1ff45 100644
--- a/src/include/taler_mintdb_plugin.h
+++ b/src/include/taler_mintdb_plugin.h
@@ -651,8 +651,16 @@ struct TALER_MINTDB_Plugin
   (*rollback) (void *cls,
                struct TALER_MINTDB_Session *sesssion);
 
+
   /**
-   * Insert a denomination key
+   * Insert a denomination key.
+   *
+   * FIXME: Note that the main mint currently does NOT use this API at
+   * all.  Furthermore, the function to retrieve denomination keys
+   * from the DB is still missing.  The main mint should check if its
+   * denomination keys are in the DB, and if not, insert them (when it
+   * loads them).  The auditor will (presumably) need the denomination
+   * key information to audit the DB. (#3808).
    *
    * @param cls the @e cls of this struct with the plugin-specific state
    * @param sesssion connection to use
@@ -665,6 +673,8 @@ struct TALER_MINTDB_Plugin
                           const struct TALER_MINTDB_DenominationKeyIssueInformation *dki);
 
 
+
+
   /**
    * Get the summary of a reserve.
    *
diff --git a/src/mintdb/plugin_mintdb_postgres.c b/src/mintdb/plugin_mintdb_postgres.c
index 6d3012ee1..5d50f07c0 100644
--- a/src/mintdb/plugin_mintdb_postgres.c
+++ b/src/mintdb/plugin_mintdb_postgres.c
@@ -89,6 +89,7 @@
     PQclear (result);                                                   \
   } while (0)
 
+
 /**
  * Run an SQL statement, ignoring errors and clearing the result.
  *
@@ -123,7 +124,7 @@ struct PostgresClosure
 
   /**
    * Thread-local database connection.
-   * Contains a pointer to PGconn or NULL.
+   * Contains a pointer to `PGconn` or NULL.
    */
   pthread_key_t db_conn_threadlocal;
 
@@ -374,6 +375,7 @@ postgres_create_tables (void *cls,
           ",wire TEXT NOT NULL"
           ")");
 #undef SQLEXEC
+#undef SQLEXEC_INDEX
 
   PQfinish (conn);
   return GNUNET_OK;