diff --git a/lib/filestorage/file_storage.php b/lib/filestorage/file_storage.php
index 7b5f5b99439..c8020e9411b 100644
--- a/lib/filestorage/file_storage.php
+++ b/lib/filestorage/file_storage.php
@@ -1987,6 +1987,7 @@ class file_storage {
         @unlink($hashfile.'.tmp');
         if (!copy($pathname, $hashfile.'.tmp')) {
             // Borked permissions or out of disk space.
+            @unlink($hashfile.'.tmp');
             ignore_user_abort($prev);
             throw new file_exception('storedfilecannotcreatefile');
         }