diff --git a/isp_box_config.md b/isp_box_config.md
index f0d07635..b835a511 100644
--- a/isp_box_config.md
+++ b/isp_box_config.md
@@ -13,7 +13,7 @@ Opening following ports are necessary to make works differents services.
 **TCP:**
 * Web: 80 <small>(HTTP)</small>, 443 <small>(HTTPS)</small>
 * [SSH](/ssh_en): 22
-* [XMPP](/XMPP_en): 5222 <small>(clients)</small>, 5269 <small>(server)</small>
+* [XMPP](/XMPP_en): 5222 <small>(clients)</small>, 5269 <small>(servers)</small>
 * [Email](/email_en):  25, 465 <small>(SMTP)</small>, 587 <small>(SMTP with SSL)</small>,  993 <small>(IMAP)</small>
 * [DNS](/dns_en): 53