diff --git a/cs/src/Connections/TunnelClient.cs b/cs/src/Connections/TunnelClient.cs
index e11e7acc..8f68c05e 100644
--- a/cs/src/Connections/TunnelClient.cs
+++ b/cs/src/Connections/TunnelClient.cs
@@ -281,6 +281,7 @@ protected virtual void OnForwardedPortConnecting(
                 var secureStream = new SecureStream(
                     e.Stream,
                     clientCredentials,
+                    false,
                     channel.Trace.WithName(channel.Trace.Name + "." + channel.ChannelId));
                 secureStream.Authenticating += OnHostAuthenticating;
 
diff --git a/cs/src/Connections/TunnelRelayTunnelHost.cs b/cs/src/Connections/TunnelRelayTunnelHost.cs
index e580714a..a41cd8b2 100644
--- a/cs/src/Connections/TunnelRelayTunnelHost.cs
+++ b/cs/src/Connections/TunnelRelayTunnelHost.cs
@@ -373,6 +373,7 @@ protected override void OnForwardedPortConnecting(
             var secureStream = new SecureStream(
                 e.Stream,
                 serverCredentials,
+                null,
                 channel.Trace.WithName(channel.Trace.Name + "." + channel.ChannelId));
 
             // The client was already authenticated by the relay.