diff --git a/htdocs/adherents/type.php b/htdocs/adherents/type.php
index cc3c697e032..fcdb643a006 100644
--- a/htdocs/adherents/type.php
+++ b/htdocs/adherents/type.php
@@ -145,6 +145,7 @@ if ($action == 'add' && $user->rights->adherent->configurer) {
 		$sql = "SELECT libelle FROM ".MAIN_DB_PREFIX."adherent_type WHERE libelle='".$db->escape($object->label)."'";
 		$sql .= " WHERE entity IN (".getEntity('member_type').")";
 		$result = $db->query($sql);
+		$num = null;
 		if ($result) {
 			$num = $db->num_rows($result);
 		}
diff --git a/htdocs/core/actions_linkedfiles.inc.php b/htdocs/core/actions_linkedfiles.inc.php
index b89d5bf6cb0..4e2cd2873b6 100644
--- a/htdocs/core/actions_linkedfiles.inc.php
+++ b/htdocs/core/actions_linkedfiles.inc.php
@@ -160,7 +160,7 @@ if ($action == 'confirm_deletefile' && $confirm == 'yes' && !empty($permissionto
 	}
 
 	if (is_object($object) && $object->id > 0) {
-		if ($backtopage) {
+		if (!empty($backtopage)) {
 			header('Location: '.$backtopage);
 			exit;
 		} else {