diff --git a/degesch.c b/degesch.c
index 9511538..8a1de8f 100644
--- a/degesch.c
+++ b/degesch.c
@@ -4758,6 +4758,8 @@ irc_real_shutdown (struct server *s)
 		s->transport->in_before_shutdown (s);
 
 	while (shutdown (s->socket, SHUT_WR) == -1)
+		// XXX: we get ENOTCONN with OpenSSL (not plain) when a localhost
+		// server is aborted, why?  strace says read 0, write 31, shutdown -1.
 		if (!soft_assert (errno == EINTR))
 			break;