diff --git a/smbprotocol/connection.py b/smbprotocol/connection.py
index 3683adb7..3e2cb694 100644
--- a/smbprotocol/connection.py
+++ b/smbprotocol/connection.py
@@ -212,6 +212,7 @@ class NtStatus(object):
     STATUS_PASSWORD_EXPIRED = 0xC0000071
     STATUS_INSUFFICIENT_RESOURCES = 0xC000009A
     STATUS_PIPE_BUSY = 0xC00000AE
+    STATUS_PIPE_CLOSING = 0xC00000B1
     STATUS_FILE_IS_A_DIRECTORY = 0xC00000BA
     STATUS_NOT_SUPPORTED = 0xC00000BB
     STATUS_BAD_NETWORK_NAME = 0xC00000CC