diff --git a/docs/faq.html b/docs/faq.html
index 173c2e4e..d4d2dcac 100644
--- a/docs/faq.html
+++ b/docs/faq.html
@@ -93,6 +93,20 @@ currently there's no public scripts for either of these, and the only way
 I'm going to add such to irssi.org is if the script contains a setting to
 specify which specific channels the announcement is sent.</p>
 
+<h3>Q: Why does irssi autojoin on invite by default?</h3>
+
+<p>A: The setting is /SET join_auto_chans_on_invite - it's not the same
+as regular autojoin-on-invite, which irssi doesn't even have. The only
+channels that are joined on invite, are the ones you've added to config
+with /CHANNEL ADD -auto. This is very useful with +i channels when you
+need to first send an invite request to bot, or if you get accidentally
+kicked from channel, the kicker can invite you back immediately.</p>
+
+<p>I don't see any bad side effects with this feature, so it's ON by
+default. I guess someone could start kicking/inviting you all the time
+but server connection shouldn't drop because of that, and you shouldn't
+join channels whose operators are that evil.</p>
+
 <h3>Q: How to make UTF-8 support work with irssi?</h3>
 
 <p>A: xterm -u8, screen -U, /SET term_type utf-8</p>