Index: cck_teaser_field.module
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/cck_teaser_field/cck_teaser_field.module,v
retrieving revision 1.1
diff -u -r1.1 cck_teaser_field.module
--- cck_teaser_field.module	16 Oct 2007 21:05:15 -0000	1.1
+++ cck_teaser_field.module	4 Dec 2007 16:26:54 -0000
@@ -31,6 +31,7 @@
   if ($op == 'alter' && $field = variable_get('teaser_field_'. $node->type, 0)) {
     if (isset($node->content[$field]) && !empty($node->content[$field]['#value'])) {
       $node->teaser = $node->content[$field]['#value'];
+      $node->readmore = TRUE;
     }
   }
 }
\ No newline at end of file