diff --git a/htdocs/master.inc.php b/htdocs/master.inc.php
index 1393fd6fc38..4b500e8f166 100644
--- a/htdocs/master.inc.php
+++ b/htdocs/master.inc.php
@@ -175,6 +175,8 @@ $conf->langage_tiret=ereg_replace('_','-',$conf->langage);
 
 setlocale(LC_ALL, $conf->langage_tiret);    // Compenser pb de locale avec windows
 setlocale(LC_ALL, $conf->langage);
+if (defined("MAIN_FORCE_SETLOCALE_LC_ALL")) setlocale(LC_ALL, MAIN_FORCE_SETLOCALE_LC_ALL);
+if (defined("MAIN_FORCE_SETLOCALE_LC_TIME")) setlocale(LC_ALL, MAIN_FORCE_SETLOCALE_LC_TIME);
 
 require_once(DOL_DOCUMENT_ROOT ."/translate.class.php");
 $langs = new Translate(DOL_DOCUMENT_ROOT ."/langs", $conf->langage);