diff --git a/src/socket/ntapi_sc_socket_v1.c b/src/socket/ntapi_sc_socket_v1.c
index c9b4519..e4752a4 100644
--- a/src/socket/ntapi_sc_socket_v1.c
+++ b/src/socket/ntapi_sc_socket_v1.c
@@ -39,6 +39,8 @@ int32_t __cdecl __ntapi_sc_socket_v1(
 	nt_sqos			ssqos;
 	nt_unicode_string	nt_afdep;
 	uint32_t		ea_length;
+	uint16_t		sdomain;
+	uint16_t		stype;
 	void *			_hsocket;
 
 	wchar16_t afd_end_point[] = {
@@ -47,6 +49,11 @@ int32_t __cdecl __ntapi_sc_socket_v1(
 		'\\','E','n','d','P','o','i','n','t',
 		0};
 
+	if (domain >= 0x10000)
+		return NT_STATUS_INVALID_PARAMETER_2;
+	else if (type > 0x10000)
+		return NT_STATUS_INVALID_PARAMETER_3;
+
 	/* tcp as default extended attribute */
 	nt_afd_socket_ea afd_ea = {
 		0,
@@ -103,11 +110,14 @@ int32_t __cdecl __ntapi_sc_socket_v1(
 	oa.obj_name = 0;
 	oa.obj_attr = 0;
 
+	sdomain = (uint16_t)domain;
+	stype   = (uint16_t)type;
+
 	if (status == NT_STATUS_SUCCESS) {
 		hssocket->hsocket	= _hsocket;
 		hssocket->ntflags	= 0;
-		hssocket->domain 	= domain;
-		hssocket->type		= type;
+		hssocket->domain 	= sdomain;
+		hssocket->type		= stype;
 		hssocket->protocol	= protocol;
 		hssocket->timeout.quad	= 0;
 		hssocket->iostatus	= NT_STATUS_SUCCESS;
diff --git a/src/socket/ntapi_sc_socket_v2.c b/src/socket/ntapi_sc_socket_v2.c
index 2fc30e5..5b1493c 100644
--- a/src/socket/ntapi_sc_socket_v2.c
+++ b/src/socket/ntapi_sc_socket_v2.c
@@ -44,6 +44,8 @@ int32_t __cdecl __ntapi_sc_socket_v2(
 	nt_sqos			ssqos;
 	nt_unicode_string	nt_afdep;
 	uint32_t		ea_length;
+	uint16_t		sdomain;
+	uint16_t		stype;
 	void *			_hsocket;
 
 	wchar16_t afd_end_point[] = {
@@ -61,6 +63,11 @@ int32_t __cdecl __ntapi_sc_socket_v2(
 		{0,0,0,0,0},
 		{0}};
 
+	if (domain >= 0x10000)
+		return NT_STATUS_INVALID_PARAMETER_2;
+	else if (type > 0x10000)
+		return NT_STATUS_INVALID_PARAMETER_3;
+
 	ea_length = sizeof(afd_ea);
 
 	afd_ea.sattr.domain	= domain;
@@ -111,10 +118,13 @@ int32_t __cdecl __ntapi_sc_socket_v2(
 	oa.obj_name = 0;
 	oa.obj_attr = 0;
 
+	sdomain = (uint16_t)domain;
+	stype   = (uint16_t)type;
+
 	hssocket->hsocket	= _hsocket;
 	hssocket->ntflags	= 0;
-	hssocket->domain 	= domain;
-	hssocket->type		= type;
+	hssocket->domain 	= sdomain;
+	hssocket->type		= stype;
 	hssocket->protocol	= protocol;
 	hssocket->timeout.quad	= 0;
 	hssocket->iostatus	= NT_STATUS_SUCCESS;