diff -Nru irssi-0.8.12.orig/src/irc/proxy/listen.c irssi-0.8.12/src/irc/proxy/listen.c
--- irssi-0.8.12.orig/src/irc/proxy/listen.c	2008-07-28 18:32:03.000000000 +0100
+++ irssi-0.8.12/src/irc/proxy/listen.c	2008-07-28 19:15:33.000000000 +0100
@@ -479,11 +497,10 @@
 		      client->proxy_address, client->nick,
 		      server->connrec->address);
 
+	int part_on_disconnect = settings_get_bool("irssiproxy_part_on_disconnect");
 	for (tmp = server->channels; tmp != NULL; tmp = tmp->next) {
 		IRC_CHANNEL_REC *rec = tmp->data;
-
-		proxy_outserver(client, "PART %s :Connection lost to server",
-				rec->name);
+		proxy_outserver(client, "%s %s :Connection lost to server", part_on_disconnect ? "PART" : "NOTICE", rec->name);
 	}
 }
 
diff -Nru irssi-0.8.12.orig/src/irc/proxy/proxy.c irssi-0.8.12/src/irc/proxy/proxy.c
--- irssi-0.8.12.orig/src/irc/proxy/proxy.c	2008-07-28 18:32:03.000000000 +0100
+++ irssi-0.8.12/src/irc/proxy/proxy.c	2008-07-28 19:15:33.000000000 +0100
@@ -25,6 +25,7 @@
 
 void irc_proxy_init(void)
 {
+	settings_add_bool("irssiproxy", "irssiproxy_part_on_disconnect", TRUE);
 	settings_add_str("irssiproxy", "irssiproxy_ports", "");
 	settings_add_str("irssiproxy", "irssiproxy_password", "");
 	settings_add_str("irssiproxy", "irssiproxy_bind", "");