diff --git a/include/ntapi/nt_socket.h b/include/ntapi/nt_socket.h
index 68dce1a..9479aa4 100644
--- a/include/ntapi/nt_socket.h
+++ b/include/ntapi/nt_socket.h
@@ -308,9 +308,9 @@ typedef struct _nt_afd_buffer {
 
 
 typedef struct _nt_afd_listen_info {
-	void *		unknown_1st;
+	uint32_t	unknown;
 	uint32_t	backlog;
-	void *		unknown_2nd;
+	uint32_t	flags;
 } nt_afd_listen_info;
 
 
diff --git a/src/socket/ntapi_sc_listen.c b/src/socket/ntapi_sc_listen.c
index 8f7fb0d..0fc0d87 100644
--- a/src/socket/ntapi_sc_listen.c
+++ b/src/socket/ntapi_sc_listen.c
@@ -22,9 +22,9 @@ int32_t __cdecl __ntapi_sc_listen(
 	iosb = iosb ? iosb : &siosb;
 
 	/* afd_listen */
-	afd_listen.unknown_1st = 0;
-	afd_listen.unknown_2nd = 0;
-	afd_listen.backlog     = (uint32_t)backlog;
+	afd_listen.unknown = 0;
+	afd_listen.flags   = 0;
+	afd_listen.backlog = (uint32_t)backlog;
 
 	hssocket->iostatus = __ntapi->zw_device_io_control_file(
 			hssocket->hsocket,