diff --git a/doc/bird.sgml b/doc/bird.sgml
index 552f6509..18795a11 100644
--- a/doc/bird.sgml
+++ b/doc/bird.sgml
@@ -3424,6 +3424,7 @@ protocol ospf [v2|v3] <name> {
 			strict nonbroadcast <switch>;
 			real broadcast <switch>;
 			ptp netmask <switch>;
+			ptp address <switch>;
 			check link <switch>;
 			bfd <switch>;
 			ecmp weight <num>;