Index: database/updates.inc
===================================================================
RCS file: /cvs/drupal/drupal/database/updates.inc,v
retrieving revision 1.172
diff -u -F^f -r1.172 updates.inc
--- database/updates.inc	31 Dec 2005 14:18:22 -0000	1.172
+++ database/updates.inc	1 Jan 2006 19:13:55 -0000
@@ -1335,7 +1335,7 @@ function system_update_164() {
 }
 
 function system_update_165() {
-  $cron_last = max(variable_get('drupal_cron_last'), variable_get('ping_cron_last'));
+  $cron_last = max(variable_get('drupal_cron_last', 0), variable_get('ping_cron_last', 0));
   variable_set('cron_last', $cron_last);
   variable_del('drupal_cron_last');
   variable_del('ping_cron_last');