diff --git a/doc/tinc.conf.5.in b/doc/tinc.conf.5.in
index fa621533..80344183 100644
--- a/doc/tinc.conf.5.in
+++ b/doc/tinc.conf.5.in
@@ -180,7 +180,7 @@ If you don't specify a host with
 won't try to connect to other daemons at all,
 and will instead just listen for incoming connections.
 
-.It Va DecrementTTL Li = yes | no Po no Pc
+.It Va DecrementTTL Li = yes | no Po no Pc Bq experimental
 When enabled,
 .Nm tinc
 will decrement the Time To Live field in IPv4 packets, or the Hop Limit field in IPv6 packets,
diff --git a/doc/tinc.texi b/doc/tinc.texi
index 4aaf507c..c8eea1f9 100644
--- a/doc/tinc.texi
+++ b/doc/tinc.texi
@@ -794,7 +794,7 @@ tinc won't try to connect to other daemons at all,
 and will instead just listen for incoming connections.
 
 @cindex DecrementTTL
-@item DecrementTTL = <yes | no> (no)
+@item DecrementTTL = <yes | no> (no) [experimental]
 When enabled, tinc will decrement the Time To Live field in IPv4 packets, or the Hop Limit field in IPv6 packets,
 before forwarding a received packet to the virtual network device or to another node,
 and will drop packets that have a TTL value of zero,