diff --git a/htdocs/core/class/html.form.class.php b/htdocs/core/class/html.form.class.php
index 9f09a76ba73..1c6aa9e7723 100644
--- a/htdocs/core/class/html.form.class.php
+++ b/htdocs/core/class/html.form.class.php
@@ -963,7 +963,7 @@ class Form
         $out='';
 
         // On recherche les utilisateurs
-        $sql = "SELECT u.rowid, u.name as lastname, u.firstname, u.login, u.admin, u.entity";
+        $sql = "SELECT DISTINCT u.rowid, u.name as lastname, u.firstname, u.login, u.admin, u.entity";
         if (! empty($conf->multicompany->enabled) && $conf->entity == 1 && $user->admin && ! $user->entity)
         {
             $sql.= ", e.label";