diff --git a/htdocs/compta/stats/prev.php b/htdocs/compta/stats/prev.php
index 1e0c06381f5..7a55e5423e5 100644
--- a/htdocs/compta/stats/prev.php
+++ b/htdocs/compta/stats/prev.php
@@ -33,7 +33,7 @@ if ($user->societe_id > 0)
 
 function pt ($db, $sql, $title) {
   global $bc;
-  global $langs;
+  global $langs,$conf;
 
   print '<table class="border" width="100%">';
   print '<tr class="liste_titre">';