diff --git a/htdocs/includes/modules/societe/mod_codeclient_zebre.php b/htdocs/includes/modules/societe/mod_codeclient_zebre.php
index 77c68c12e094a75f643249e22d908444e2950f30..2767da61773af42fb505eca45d8578258988a277 100644
--- a/htdocs/includes/modules/societe/mod_codeclient_zebre.php
+++ b/htdocs/includes/modules/societe/mod_codeclient_zebre.php
@@ -51,7 +51,7 @@ class mod_codeclient_zebre
    *
    */
 
-  function verif($db, $code, $socid=0)
+  function verif($db, &$code, $socid=0)
     { 
       $code = strtoupper(trim($code));
 
diff --git a/htdocs/societe.class.php b/htdocs/societe.class.php
index dd924fe13be4d8479a03c8d4e9208e80edb7dcad..297c868b761297b01c4d250e7463e76b9044d420 100644
--- a/htdocs/societe.class.php
+++ b/htdocs/societe.class.php
@@ -1030,7 +1030,7 @@ class Societe {
 
 	$mod = new $var;
 
-	return $mod->verif($this->db, &$this->code_client);
+	return $mod->verif($this->db, $this->code_client);
       }
     else
       {