diff --git a/htdocs/adherents/htpasswd.php b/htdocs/adherents/htpasswd.php
index 975926f3caa..aa2be711d2b 100644
--- a/htdocs/adherents/htpasswd.php
+++ b/htdocs/adherents/htpasswd.php
@@ -39,8 +39,8 @@ llxHeader();
 
 $now=dol_now();
 
-if ($sortorder == "") {  $sortorder="ASC"; }
-if ($sortfield == "") {  $sortfield="d.login"; }
+if (empty($sortorder)) {  $sortorder="ASC"; }
+if (empty($sortfield)) {  $sortfield="d.login"; }
 if (! isset($statut))
 {
   $statut = 1 ;