diff --git a/htdocs/core/actions_linkedfiles.inc.php b/htdocs/core/actions_linkedfiles.inc.php
index b89d5bf6cb0..93d1e8463ec 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 (isset($backtopage)) {
 			header('Location: '.$backtopage);
 			exit;
 		} else {