diff --git a/Source/MQTTnet/Server/Internal/MqttClientSubscriptionsManager.cs b/Source/MQTTnet/Server/Internal/MqttClientSubscriptionsManager.cs
index 4155331d..b409d959 100644
--- a/Source/MQTTnet/Server/Internal/MqttClientSubscriptionsManager.cs
+++ b/Source/MQTTnet/Server/Internal/MqttClientSubscriptionsManager.cs
@@ -483,7 +483,7 @@ namespace MQTTnet.Server
 
         async Task<InterceptingUnsubscriptionEventArgs> InterceptUnsubscribe(string topicFilter, MqttSubscription mqttSubscription, CancellationToken cancellationToken)
         {
-            var clientUnsubscribingTopicEventArgs = new InterceptingUnsubscriptionEventArgs(cancellationToken, topicFilter, _session.Items, topicFilter)
+            var clientUnsubscribingTopicEventArgs = new InterceptingUnsubscriptionEventArgs(cancellationToken, _session.Id, _session.Items, topicFilter)
             {
                 Response =
                 {