pgsql syntax warning message

With postgresql the advanced poll module gives this 2 warning message if I put the recent polls block to the drupal site:

* warning: pg_query(): Query failed: ERROR: syntax error at or near "nid" at character 19 in /usr/share/drupal5/includes/database.pgsql.inc on line 125.
* user warning: query: SELECT MAX(n.nid) nid FROM node n INNER JOIN advpoll p ON p.nid = n.nid WHERE n.status = 1 AND p.active=1 in /usr/share/drupal5/includes/database.pgsql.inc on line 144.

As I tracked down, in the advpoll.module the advpoll_mostrecent function has a query on line 66:

$result = db_query('SELECT MAX(n.nid) nid FROM {node} n INNER JOIN {advpoll} p ON p.nid = n.nid WHERE n.status = 1 AND p.active=1');

The warning message disappeared after I changed the line like this:

$result = db_query('SELECT MAX(n.nid) as nid FROM {node} n INNER JOIN {advpoll} p ON p.nid = n.nid WHERE n.status = 1 AND p.active=1');