diff --git a/man7/socket.7 b/man7/socket.7
index f0d53a81e..478fa364c 100644
--- a/man7/socket.7
+++ b/man7/socket.7
@@ -1148,6 +1148,7 @@ program is designed to always set this option.
 .BR setsockopt (2),
 .BR socket (2),
 .BR pcap (3),
+.BR address_families (7),
 .BR capabilities (7),
 .BR ddp (7),
 .BR ip (7),