diff --git a/src/PhpSpreadsheet/Writer/IWriter.php b/src/PhpSpreadsheet/Writer/IWriter.php
index b0a62726..d8bf1f0c 100644
--- a/src/PhpSpreadsheet/Writer/IWriter.php
+++ b/src/PhpSpreadsheet/Writer/IWriter.php
@@ -62,6 +62,8 @@ interface IWriter
      * Save PhpSpreadsheet to file.
      *
      * @param resource|string $filename Name of the file to save
+     *
+     * @throws Exception
      */
     public function save($filename, int $flags = 0): void;