From b75076a1c541ae56571e214d49dceea0921f967f Mon Sep 17 00:00:00 2001
From: Christian <6939810+chkr1011@users.noreply.github.com>
Date: Thu, 9 Jun 2022 21:23:34 +0200
Subject: [PATCH] Skip adding default message expiry interval.

---
 Source/MQTTnet/Formatter/V5/MqttV5PropertiesWriter.cs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Source/MQTTnet/Formatter/V5/MqttV5PropertiesWriter.cs b/Source/MQTTnet/Formatter/V5/MqttV5PropertiesWriter.cs
index 3307b661..6b274bba 100644
--- a/Source/MQTTnet/Formatter/V5/MqttV5PropertiesWriter.cs
+++ b/Source/MQTTnet/Formatter/V5/MqttV5PropertiesWriter.cs
@@ -84,6 +84,11 @@ namespace MQTTnet.Formatter.V5
         {
             // If absent, the Application Message does not expire.
             // This library uses 0 to indicate no expiration.
+            if (value == 0)
+            {
+                return;
+            }
+            
             WriteAsFourByteInteger(MqttPropertyId.MessageExpiryInterval, value);
         }