diff --git a/scripts/antifuck.pl b/scripts/antifuck.pl
index 2953abd..9a6deee 100644
--- a/scripts/antifuck.pl
+++ b/scripts/antifuck.pl
@@ -134,7 +134,7 @@ sub client_join {
 		shift =~ /^join :?([^ ]*)/i);
 	($server, $channel) = (lc $server, lc $channel);
 
-	$channels{$server}{$channel} = 1;
+	$channels{$server}{$_} = 1 for (split ',', $channel);
 	return weechat::WEECHAT_RC_OK;
 }