From 2d40a3b58c729160b42caac374a44d4561f6e48f Mon Sep 17 00:00:00 2001
From: Yonas Habteab <yonas.habteab@icinga.com>
Date: Tue, 15 Aug 2023 16:53:57 +0200
Subject: [PATCH] Mail: Fix `object/string` is in `isset()` not nullable error

---
 library/Reporting/Mail.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/library/Reporting/Mail.php b/library/Reporting/Mail.php
index 0c3af4e3..810b166b 100644
--- a/library/Reporting/Mail.php
+++ b/library/Reporting/Mail.php
@@ -14,13 +14,13 @@ class Mail
     /** @var string */
     public const DEFAULT_SUBJECT = 'Icinga Reporting';
 
-    /** @var string */
+    /** @var ?string */
     protected $from;
 
     /** @var string */
     protected $subject = self::DEFAULT_SUBJECT;
 
-    /** @var Zend_Mail_Transport_Sendmail */
+    /** @var ?Zend_Mail_Transport_Sendmail */
     protected $transport;
 
     /** @var array */