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diff --git a/doc/bird.sgml b/doc/bird.sgml
index 4df1d94f..9d762ee9 100644
--- a/doc/bird.sgml
+++ b/doc/bird.sgml
@@ -2153,6 +2153,13 @@ protocol bfd [<name>] {
to configure separate BFD protocol instances for IPv4 and for IPv6
sessions.
+ <tag><label id="bfd-strict-bind">strict bind <m/switch/</tag>
+ Specify whether each BFD interface should use a separate listening
+ socket bound to its local address, or just use a shared listening socket
+ accepting all addresses. Binding to a specific address could be useful
+ in cases like running multiple BIRD instances on a machine, each
+ handling a different set of interfaces. Default: disabled.
+
<tag><label id="bfd-iface">interface <m/pattern/ [, <m/.../] { <m/options/ }</tag>
Interface definitions allow to specify options for sessions associated
with such interfaces and also may contain interface specific options.