diff --git a/htdocs/install/etape5.php b/htdocs/install/etape5.php
index 6dd10169a0df7e99c3a7cfa294156c8011fbe355..c5f8a4b610316111498bfacd2b0d9f4a50848157 100644
--- a/htdocs/install/etape5.php
+++ b/htdocs/install/etape5.php
@@ -126,8 +126,8 @@ if ($_POST["action"] == "set" || preg_match('/upgrade/i',$_POST["action"]))
 	$conf->db->name = $dolibarr_main_db_name;
 	$conf->db->user = $dolibarr_main_db_user;
 	$conf->db->pass = $dolibarr_main_db_pass;
-	$conf->db->dolibarr_main_db_encryption = $dolibarr_main_db_encryption;
-	$conf->db->dolibarr_main_db_cryptkey = $dolibarr_main_db_cryptkey;
+	$conf->db->dolibarr_main_db_encryption = isset($dolibarr_main_db_encryption)?$dolibarr_main_db_encryption:'';
+	$conf->db->dolibarr_main_db_cryptkey = isset($dolibarr_main_db_cryptkey)?$dolibarr_main_db_cryptkey:'';
 
 	$db = new DoliDb($conf->db->type,$conf->db->host,$conf->db->user,$conf->db->pass,$conf->db->name,$conf->db->port);