diff --git a/scripts/antifuck.pl b/scripts/antifuck.pl
index cc84062..0a96df4 100644
--- a/scripts/antifuck.pl
+++ b/scripts/antifuck.pl
@@ -42,6 +42,7 @@ HELP
 	weechat::hook_signal('*,irc_out1_join', 'client_join', '');
 	weechat::hook_signal('*,irc_out1_part', 'client_part', '');
 	weechat::hook_signal('*,irc_raw_in_001', 'irc_001', '');
+	weechat::hook_signal('*,irc_raw_in_470', 'irc_470', '');
 	weechat::hook_modifier('irc_in_366', 'irc_366', '');
 	weechat::hook_modifier('irc_in_part', 'irc_part', '');
 
@@ -226,6 +227,18 @@ sub irc_366
 	return '';
 }
 
+sub irc_470
+{
+	my (undef, $server, $oldchan, $newchan) = (shift,
+		shift =~ /(.+),irc_raw_in_470/,
+		shift =~ /^:[^ ]* 470 [^ ]+ ([^ ]+) ([^ ]+)/);
+	($server, $oldchan, $newchan) = (lc $server, lc $oldchan, lc $newchan);
+
+	delete $channels{$server}{$oldchan};
+	$channels{$server}{$newchan} = 1;
+	return weechat::WEECHAT_RC_OK;
+}
+
 sub irc_join_delay
 {
 	my $buffer = shift;