diff --git a/degesch.c b/degesch.c
index 85f3ff4..5ed9dc8 100644
--- a/degesch.c
+++ b/degesch.c
@@ -2279,6 +2279,10 @@ irc_process_numeric (struct app_context *ctx,
 
 	switch (numeric)
 	{
+	case IRC_RPL_ISUPPORT:
+		// TODO: parse this, mainly PREFIX; see
+		//   http://www.irc.org/tech_docs/draft-brocklesby-irc-isupport-03.txt
+		break;
 	case IRC_RPL_NAMREPLY:
 		// TODO: find the channel and if found, push nicks to names_buf
 		break;
diff --git a/kike-replies b/kike-replies
index b5f4674..349f12f 100644
--- a/kike-replies
+++ b/kike-replies
@@ -2,6 +2,7 @@
 2 IRC_RPL_YOURHOST ":Your host is %s, running version %s"
 3 IRC_RPL_CREATED ":This server was created %s"
 4 IRC_RPL_MYINFO "%s %s %s %s"
+5 IRC_RPL_ISUPPORT "%s :are supported by this server"
 221 IRC_RPL_UMODEIS "+%s"
 251 IRC_RPL_LUSERCLIENT ":There are %d users and %d services on %d servers"
 252 IRC_RPL_LUSEROP "%d :operator(s) online"
diff --git a/kike.c b/kike.c
index 83f9d85..bd3c3fb 100644
--- a/kike.c
+++ b/kike.c
@@ -1044,6 +1044,8 @@ irc_try_finish_registration (struct client *c)
 	irc_send_reply (c, IRC_RPL_MYINFO, ctx->server_name, PROGRAM_VERSION,
 		IRC_SUPPORTED_USER_MODES, IRC_SUPPORTED_CHAN_MODES);
 
+	// TODO: also output IRC_RPL_ISUPPORT
+
 	irc_send_lusers (c);
 	irc_send_motd (c);