Index: modules/translation/translation.pages.inc
===================================================================
RCS file: /cvs/drupal/drupal/modules/translation/translation.pages.inc,v
retrieving revision 1.17
diff -u -p -r1.17 translation.pages.inc
--- modules/translation/translation.pages.inc	22 Nov 2010 06:14:55 -0000	1.17
+++ modules/translation/translation.pages.inc	30 Dec 2010 14:48:58 -0000
@@ -13,6 +13,8 @@
  *   Node object.
  */
 function translation_node_overview($node) {
+  include_once DRUPAL_ROOT . '/includes/language.inc';
+
   if ($node->tnid) {
     // Already part of a set, grab that set.
     $tnid = $node->tnid;