diff --git a/include/ntapi/nt_tty.h b/include/ntapi/nt_tty.h
index 22c24a4..387c8b6 100644
--- a/include/ntapi/nt_tty.h
+++ b/include/ntapi/nt_tty.h
@@ -438,6 +438,10 @@ typedef int32_t __stdcall	ntapi_tty_connect(
 	__in	int32_t			impersonation_level);
 
 
+typedef int32_t __stdcall	ntapi_tty_client_session_disconnect(
+	__in	void *			hport);
+
+
 typedef int32_t __stdcall	ntapi_tty_client_session_query(
 	__in	void *			hport,
 	__out	nt_tty_session_info *	sessioninfo);
diff --git a/include/ntapi/ntapi.h b/include/ntapi/ntapi.h
index eff9c94..7e8208c 100644
--- a/include/ntapi/ntapi.h
+++ b/include/ntapi/ntapi.h
@@ -536,6 +536,7 @@ typedef struct _ntapi_vtbl {
 	ntapi_tty_create_session *			tty_create_session;
 	ntapi_tty_join_session *			tty_join_session;
 	ntapi_tty_connect *				tty_connect;
+	ntapi_tty_client_session_disconnect *		tty_client_session_disconnect;
 	ntapi_tty_client_session_query *		tty_client_session_query;
 	ntapi_tty_client_session_set *			tty_client_session_set;
 	ntapi_tty_client_process_register *		tty_client_process_register;
diff --git a/project/common.mk b/project/common.mk
index 65d6713..a8e0cd9 100644
--- a/project/common.mk
+++ b/project/common.mk
@@ -94,6 +94,7 @@ COMMON_SRCS = \
 	src/thread/ntapi_tt_create_thread.c \
 	src/token/ntapi_tt_token_privilege.c \
 	src/tty/ntapi_tty_client_process_register.c \
+	src/tty/ntapi_tty_client_session_disconnect.c \
 	src/tty/ntapi_tty_client_session_query.c \
 	src/tty/ntapi_tty_client_session_set.c \
 	src/tty/ntapi_tty_connect.c \
diff --git a/src/internal/ntapi.c b/src/internal/ntapi.c
index 8e3c4b9..42812c0 100644
--- a/src/internal/ntapi.c
+++ b/src/internal/ntapi.c
@@ -327,6 +327,7 @@ static int32_t __fastcall __ntapi_init_once(ntapi_vtbl ** pvtbl)
 	__ntapi->tty_create_session				= __ntapi_tty_create_session;
 	__ntapi->tty_join_session				= __ntapi_tty_join_session;
 	__ntapi->tty_connect					= __ntapi_tty_connect;
+	__ntapi->tty_client_session_disconnect			= __ntapi_tty_client_session_disconnect;
 	__ntapi->tty_client_session_query			= __ntapi_tty_client_session_query;
 	__ntapi->tty_client_session_set				= __ntapi_tty_client_session_set;
 	__ntapi->tty_client_process_register			= __ntapi_tty_client_process_register;
diff --git a/src/internal/ntapi_fnapi.h b/src/internal/ntapi_fnapi.h
index 9fa215c..39f8ac3 100644
--- a/src/internal/ntapi_fnapi.h
+++ b/src/internal/ntapi_fnapi.h
@@ -199,6 +199,7 @@ ntapi_vfd_dev_name_init				__ntapi_vfd_dev_name_init;
 ntapi_tty_create_session			__ntapi_tty_create_session;
 ntapi_tty_join_session				__ntapi_tty_join_session;
 ntapi_tty_connect				__ntapi_tty_connect;
+ntapi_tty_client_session_disconnect		__ntapi_tty_client_session_disconnect;
 ntapi_tty_client_session_query			__ntapi_tty_client_session_query;
 ntapi_tty_client_session_set			__ntapi_tty_client_session_set;
 ntapi_tty_client_process_register		__ntapi_tty_client_process_register;
diff --git a/src/tty/ntapi_tty_client_session_disconnect.c b/src/tty/ntapi_tty_client_session_disconnect.c
new file mode 100644
index 0000000..e977749
--- /dev/null
+++ b/src/tty/ntapi_tty_client_session_disconnect.c
@@ -0,0 +1,38 @@
+/********************************************************/
+/*  ntapi: Native API core library                      */
+/*  Copyright (C) 2013--2017  Z. Gilboa                 */
+/*  Released under GPLv2 and GPLv3; see COPYING.NTAPI.  */
+/********************************************************/
+
+#include <psxtypes/psxtypes.h>
+#include <ntapi/nt_tty.h>
+#include <ntapi/ntapi.h>
+#include "ntapi_impl.h"
+
+typedef struct _nt_tty_disconnect_msg {
+	nt_port_message			header;
+	struct {
+		nt_tty_msg_info		ttyinfo;
+	} data;
+} nt_tty_disconnect_msg;
+
+int32_t __stdcall __ntapi_tty_client_session_disconnect(void * hport)
+{
+	int32_t			status;
+	nt_tty_disconnect_msg	msg;
+
+	hport = hport ? hport :  __ntapi_internals()->hport_tty_session;
+
+	__ntapi->tt_aligned_block_memset(
+		&msg,0,sizeof(msg));
+
+	msg.header.msg_type	= NT_LPC_NEW_MESSAGE;
+	msg.header.data_size	= sizeof(msg.data);
+	msg.header.msg_size	= sizeof(msg);
+	msg.data.ttyinfo.opcode	= NT_TTY_CLIENT_SESSION_DISCONNECT;
+
+	if ((status = __ntapi->zw_request_wait_reply_port(hport,&msg,&msg)))
+		return status;
+
+	return msg.data.ttyinfo.status;
+}