diff --git a/data/web/inc/ajax/dns_diagnostics.php b/data/web/inc/ajax/dns_diagnostics.php
index 54fc6cac..c6781cb6 100644
--- a/data/web/inc/ajax/dns_diagnostics.php
+++ b/data/web/inc/ajax/dns_diagnostics.php
@@ -140,7 +140,7 @@ if (isset($_SESSION['mailcow_cc_role']) && ($_SESSION['mailcow_cc_role'] == "adm
       $records[] = array(
         '_xmpp-client._tcp.' . $domain_details['xmpp_prefix'] . '.' . $domain,
         'SRV',
-        $mailcow_hostname . ' ' . array_pop(explode(':', getenv('XMPP_C22_PORT')))
+        $mailcow_hostname . ' ' . array_pop(explode(':', getenv('XMPP_C2S_PORT')))
       );
       $records[] = array(
         '_xmpp-server._tcp.' . $domain_details['xmpp_prefix'] . '.' . $domain,
diff --git a/docker-compose.yml b/docker-compose.yml
index 77ea833c..d2ead1de 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -146,7 +146,7 @@ services:
         - SUBMISSION_PORT=${SUBMISSION_PORT:-587}
         - SMTPS_PORT=${SMTPS_PORT:-465}
         - SMTP_PORT=${SMTP_PORT:-25}
-        - XMPP_C22_PORT=${XMPP_C22_PORT:-5222}
+        - XMPP_C2S_PORT=${XMPP_C2S_PORT:-5222}
         - XMPP_S2S_PORT=${XMPP_S2S_PORT:-5269}
         - API_KEY=${API_KEY:-invalid}
         - API_KEY_READ_ONLY=${API_KEY_READ_ONLY:-invalid}
@@ -551,7 +551,7 @@ services:
         - DBUSER=${DBUSER}
         - DBPASS=${DBPASS}
       ports:
-        - "${XMPP_C22_PORT:-5222}:5222"
+        - "${XMPP_C2S_PORT:-5222}:5222"
         - "${XMPP_S2S_PORT:-5269}:5269"
         - "${XMPP_HTTPS_PORT:-5443}:5443"
       networks:
diff --git a/generate_config.sh b/generate_config.sh
index 7f5db304..10a3bc66 100755
--- a/generate_config.sh
+++ b/generate_config.sh
@@ -170,7 +170,7 @@ DOVEADM_PORT=127.0.0.1:19991
 SQL_PORT=127.0.0.1:13306
 SOLR_PORT=127.0.0.1:18983
 REDIS_PORT=127.0.0.1:7654
-XMPP_C22_PORT=5222
+XMPP_C2S_PORT=5222
 XMPP_S2S_PORT=5269
 
 # Your timezone
diff --git a/update.sh b/update.sh
index 05e9b1a5..c8f9eb75 100755
--- a/update.sh
+++ b/update.sh
@@ -218,7 +218,7 @@ CONFIG_ARRAY=(
   "DOVECOT_MASTER_USER"
   "DOVECOT_MASTER_PASS"
   "MAILCOW_PASS_SCHEME"
-  "XMPP_C22_PORT"
+  "XMPP_C2S_PORT"
   "XMPP_S2S_PORT"
 )
 
@@ -401,9 +401,9 @@ for option in ${CONFIG_ARRAY[@]}; do
       echo '# see https://mailcow.github.io/mailcow-dockerized-docs/model-passwd/' >> mailcow.conf
       echo "MAILCOW_PASS_SCHEME=BLF-CRYPT" >> mailcow.conf
   fi
-  elif [[ ${option} == "XMPP_C22_PORT" ]]; then
+  elif [[ ${option} == "XMPP_C2S_PORT" ]]; then
     if ! grep -q ${option} mailcow.conf; then
-      echo "XMPP_C22_PORT=5222" >> mailcow.conf
+      echo "XMPP_C2S_PORT=5222" >> mailcow.conf
   fi
   elif [[ ${option} == "XMPP_S2S_PORT" ]]; then
     if ! grep -q ${option} mailcow.conf; then