diff --git a/htdocs/public/members/public_list.php b/htdocs/public/members/public_list.php
index 968b1a30065..d186467ee04 100644
--- a/htdocs/public/members/public_list.php
+++ b/htdocs/public/members/public_list.php
@@ -92,7 +92,7 @@ $filter=GETPOST('filter');
 $statut=GETPOST('statut');
 
 if (! $sortorder) {  $sortorder="ASC"; }
-if (! $sortfield) {  $sortfield="nom"; }
+if (! $sortfield) {  $sortfield="lastname"; }
 
 
 /*