diff --git a/SMBLibrary/SMB2/Enums/Negotiate/SecurityMode.cs b/SMBLibrary/SMB2/Enums/Negotiate/SecurityMode.cs
index ee1d8c2..bfd9937 100644
--- a/SMBLibrary/SMB2/Enums/Negotiate/SecurityMode.cs
+++ b/SMBLibrary/SMB2/Enums/Negotiate/SecurityMode.cs
@@ -1,6 +1,8 @@
+using System;
 
 namespace SMBLibrary.SMB2
 {
+    [Flags]
     public enum SecurityMode : ushort
     {
         SigningEnabled = 0x0001,  // SMB2_NEGOTIATE_SIGNING_ENABLED
diff --git a/SMBLibrary/Server/SMB2/SessionSetupHelper.cs b/SMBLibrary/Server/SMB2/SessionSetupHelper.cs
index 47d9f33..f0d93f2 100644
--- a/SMBLibrary/Server/SMB2/SessionSetupHelper.cs
+++ b/SMBLibrary/Server/SMB2/SessionSetupHelper.cs
@@ -1,4 +1,4 @@
-/* Copyright (C) 2017 Tal Aloni <tal.aloni.il@gmail.com>. All rights reserved.
+/* Copyright (C) 2017-2019 Tal Aloni <tal.aloni.il@gmail.com>. All rights reserved.
  * 
  * You can redistribute this program and/or modify it under the terms of
  * the GNU Lesser Public License as published by the Free Software Foundation,
@@ -66,7 +66,7 @@ namespace SMBLibrary.Server.SMB2
                 if (!isGuest.HasValue || !isGuest.Value)
                 {
                     state.LogToServer(Severity.Information, "Session Setup: User '{0}' authenticated successfully (Domain: '{1}', Workstation: '{2}', OS version: '{3}').", userName, domainName, machineName, osVersion);
-                    bool signingRequired = (request.SecurityMode == SecurityMode.SigningRequired);
+                    bool signingRequired = (request.SecurityMode & SecurityMode.SigningRequired) > 0;
                     state.CreateSession(request.Header.SessionID, userName, machineName, sessionKey, accessToken, signingRequired);
                 }
                 else