Index: includes/database/pgsql/schema.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/database/pgsql/schema.inc,v
retrieving revision 1.3
diff -u -p -r1.3 schema.inc
--- includes/database/pgsql/schema.inc	26 Nov 2008 13:42:25 -0000	1.3
+++ includes/database/pgsql/schema.inc	12 Dec 2008 00:45:11 -0000
@@ -84,12 +84,7 @@ class DatabaseSchema_pgsql extends Datab
       unset($spec['not null']);
     }
     if (!empty($spec['unsigned'])) {
-      if ($spec['type'] == 'serial') {
-        $sql .= " CHECK ($name >= 0)";
-      }
-      else {
-        $sql .= '_unsigned';
-      }
+      $sql .= " CHECK ($name >= 0)";
     }
 
     if (!empty($spec['length'])) {