diff --git a/SMBLibrary/Server/SMB1/NTTransactHelper.cs b/SMBLibrary/Server/SMB1/NTTransactHelper.cs
index 7f4045e..7c215dd 100644
--- a/SMBLibrary/Server/SMB1/NTTransactHelper.cs
+++ b/SMBLibrary/Server/SMB1/NTTransactHelper.cs
@@ -88,6 +88,8 @@ namespace SMBLibrary.Server.SMB1
             }
             else if (subcommand is NTTransactNotifyChangeRequest)
             {
+                // [MS-CIFS] If the server does not support the NT_TRANSACT_NOTIFY_CHANGE subcommand, it can return an
+                // error response with STATUS_NOT_IMPLEMENTED [..] in response to an NT_TRANSACT_NOTIFY_CHANGE Request.
                 header.Status = NTStatus.STATUS_NOT_IMPLEMENTED;
             }
             else if (subcommand is NTTransactQuerySecurityDescriptorRequest)