diff --git a/htdocs/admin/ihm.php b/htdocs/admin/ihm.php
index c4e94a04ecd..b3f50ac43c7 100644
--- a/htdocs/admin/ihm.php
+++ b/htdocs/admin/ihm.php
@@ -63,7 +63,7 @@ if (isset($_POST["action"]) && $_POST["action"] == 'update')
 	dolibarr_set_const($db, "MAIN_DISABLE_JAVASCRIPT", $_POST["main_disable_javascript"],'chaine',0,'',$conf->entity);
 	//dolibarr_set_const($db, "MAIN_CONFIRM_AJAX",       $_POST["MAIN_CONFIRM_AJAX"],'chaine',0,'',$conf->entity);
 	//dolibarr_set_const($db, "MAIN_POPUP_CALENDAR",     $_POST["MAIN_POPUP_CALENDAR"],'chaine',0,'',$conf->entity);
-	//dolibarr_set_const($db, "MAIN_USE_PREVIEW_TABS",   $_POST["main_use_preview_tabs"],'chaine',0,'',$conf->entity);
+	dolibarr_set_const($db, "MAIN_USE_PREVIEW_TABS",   $_POST["main_use_preview_tabs"],'chaine',0,'',$conf->entity);
 	dolibarr_set_const($db, "MAIN_START_WEEK",         $_POST["MAIN_START_WEEK"],'chaine',0,'',$conf->entity);
 	dolibarr_set_const($db, "MAIN_SHOW_LOGO",          $_POST["MAIN_SHOW_LOGO"],'chaine',0,'',$conf->entity);
 	dolibarr_set_const($db, "MAIN_FIRSTNAME_NAME_POSITION",          $_POST["MAIN_FIRSTNAME_NAME_POSITION"],'chaine',0,'',$conf->entity);