diff --git a/htdocs/compta/accounting-files.php b/htdocs/compta/accounting-files.php
index d9467795953..edfe20bce00 100644
--- a/htdocs/compta/accounting-files.php
+++ b/htdocs/compta/accounting-files.php
@@ -480,7 +480,7 @@ if (($action == 'searchfiles' || $action == 'dl')) {
  *ZIP creation
  */
 
-$dirfortmpfile = ($conf->accounting->dir_temp ? $conf->accounting->dir_temp : $conf->comptabilite->dir_temp);
+$dirfortmpfile = (!empty($conf->accounting->dir_temp) ? $conf->accounting->dir_temp : $conf->comptabilite->dir_temp);
 if (empty($dirfortmpfile)) {
 	setEventMessages($langs->trans("ErrorNoAccountingModuleEnabled"), null, 'errors');
 	$error++;