diff --git a/include/ntapi/nt_socket.h b/include/ntapi/nt_socket.h
index c6f47b9..1f8dd14 100644
--- a/include/ntapi/nt_socket.h
+++ b/include/ntapi/nt_socket.h
@@ -509,6 +509,15 @@ typedef int32_t __cdecl ntapi_sc_server_duplicate_socket(
 	__out	nt_io_status_block *	iosb		__optional);
 
 
+typedef int32_t __cdecl ntapi_sc_setsockopt(
+	__in	nt_socket *		hssocket,
+	__in	int32_t			level,
+	__in	int32_t			optname,
+	__in	const void *		optval,
+	__in	uint32_t		optlen,
+	__out	nt_io_status_block *	iosb		__optional);
+
+
 typedef int32_t __cdecl ntapi_sc_wait(nt_socket * hssocket, nt_iosb * iosb, nt_timeout * timeout);
 
 #endif
diff --git a/include/ntapi/ntapi.h b/include/ntapi/ntapi.h
index 17d9871..904a563 100644
--- a/include/ntapi/ntapi.h
+++ b/include/ntapi/ntapi.h
@@ -547,6 +547,7 @@ typedef struct _ntapi_vtbl {
 	ntapi_sc_getpeername *				sc_getpeername;
 	ntapi_sc_server_accept_connection *		sc_server_accept_connection;
 	ntapi_sc_server_duplicate_socket *		sc_server_duplicate_socket;
+	ntapi_sc_setsockopt *				sc_setsockopt;
 	ntapi_sc_wait *					sc_wait;
 
 	/* nt_mount.h */
diff --git a/project/common.mk b/project/common.mk
index 0e3bb9a..bc41360 100644
--- a/project/common.mk
+++ b/project/common.mk
@@ -61,6 +61,7 @@ COMMON_SRCS = \
 	src/socket/ntapi_sc_server_accept_connection_v1.c \
 	src/socket/ntapi_sc_server_accept_connection_v2.c \
 	src/socket/ntapi_sc_server_duplicate_socket.c \
+	src/socket/ntapi_sc_setsockopt.c \
 	src/socket/ntapi_sc_shutdown.c \
 	src/socket/ntapi_sc_socket_v1.c \
 	src/socket/ntapi_sc_socket_v2.c \
diff --git a/src/internal/ntapi.c b/src/internal/ntapi.c
index 885fe61..451ccd7 100644
--- a/src/internal/ntapi.c
+++ b/src/internal/ntapi.c
@@ -308,6 +308,7 @@ static int32_t __fastcall __ntapi_init_once(ntapi_vtbl ** pvtbl)
 	__ntapi->sc_recv 					= __ntapi_sc_recv;
 	__ntapi->sc_shutdown					= __ntapi_sc_shutdown;
 	__ntapi->sc_server_duplicate_socket			= __ntapi_sc_server_duplicate_socket;
+	__ntapi->sc_setsockopt					= __ntapi_sc_setsockopt;
 	__ntapi->sc_wait = __ntapi_sc_wait;
 
 	/* nt_mount.h */
diff --git a/src/internal/ntapi_fnapi.h b/src/internal/ntapi_fnapi.h
index a22c659..05f4707 100644
--- a/src/internal/ntapi_fnapi.h
+++ b/src/internal/ntapi_fnapi.h
@@ -203,6 +203,7 @@ ntapi_sc_getpeername				__ntapi_sc_getpeername_v2;
 ntapi_sc_server_accept_connection		__ntapi_sc_server_accept_connection_v1;
 ntapi_sc_server_accept_connection		__ntapi_sc_server_accept_connection_v2;
 ntapi_sc_server_duplicate_socket		__ntapi_sc_server_duplicate_socket;
+ntapi_sc_setsockopt				__ntapi_sc_setsockopt;
 ntapi_sc_listen					__ntapi_sc_listen;
 ntapi_sc_accept					__ntapi_sc_accept;
 ntapi_sc_send					__ntapi_sc_send;
diff --git a/src/socket/ntapi_sc_setsockopt.c b/src/socket/ntapi_sc_setsockopt.c
new file mode 100644
index 0000000..4989e54
--- /dev/null
+++ b/src/socket/ntapi_sc_setsockopt.c
@@ -0,0 +1,50 @@
+/********************************************************/
+/*  ntapi: Native API core library                      */
+/*  Copyright (C) 2013--2016  Z. Gilboa                 */
+/*  Released under GPLv2 and GPLv3; see COPYING.NTAPI.  */
+/********************************************************/
+
+#include <psxtypes/psxtypes.h>
+#include <ntapi/nt_object.h>
+#include <ntapi/nt_file.h>
+#include <ntapi/nt_socket.h>
+#include <ntapi/ntapi.h>
+#include "ntapi_impl.h"
+
+int32_t __cdecl __ntapi_sc_setsockopt(
+	__in	nt_socket *		hssocket,
+	__in	int32_t			level,
+	__in	int32_t			optname,
+	__in	const void *		optval,
+	__in	uint32_t		optlen,
+	__out	nt_io_status_block *	iosb)
+{
+	nt_afd_sockopt_info	afd_sockopt;
+	nt_io_status_block	siosb;
+
+	iosb = iosb ? iosb : &siosb;
+
+	/* afd_sockopt */
+	afd_sockopt.mode    = NT_AFD_SOCKOPT_SET;
+	afd_sockopt.level   = level;
+	afd_sockopt.optname = optname;
+	afd_sockopt.optval  = optval;
+	afd_sockopt.optlen  = optlen;
+	afd_sockopt.ding    = 1;
+
+	hssocket->iostatus = __ntapi->zw_device_io_control_file(
+			hssocket->hsocket,
+			hssocket->hevent,
+			0,
+			0,
+			iosb,
+			NT_AFD_IOCTL_SOCKOPT,
+			&afd_sockopt,
+			sizeof(afd_sockopt),
+			0,
+			0);
+
+	return hssocket->iostatus
+		? __ntapi->sc_wait(hssocket,iosb,0)
+		: NT_STATUS_SUCCESS;
+}