diff --git a/lib/libc/sys/socket.2 b/lib/libc/sys/socket.2
--- a/lib/libc/sys/socket.2
+++ b/lib/libc/sys/socket.2
@@ -28,7 +28,7 @@
 .\"     From: @(#)socket.2	8.1 (Berkeley) 6/4/93
 .\" $FreeBSD$
 .\"
-.Dd August 30, 2022
+.Dd January 15, 2023
 .Dt SOCKET 2
 .Os
 .Sh NAME
@@ -64,6 +64,7 @@
 PF_ROUTE	Internal routing protocol,
 PF_KEY		Internal key-management function,
 PF_NETGRAPH	Netgraph sockets,
+PF_NETLINK	Netlink protocols,
 PF_BLUETOOTH	Bluetooth protocols,
 PF_INET_SDP	OFED socket direct protocol (IPv4),
 AF_HYPERV	HyperV sockets