diff --git a/CHANGELOG.TXT b/CHANGELOG.TXT
index 9b45cc2e..c5e99d82 100644
--- a/CHANGELOG.TXT
+++ b/CHANGELOG.TXT
@@ -18,7 +18,7 @@ Changes since 2.3.6 release
   - don't trim() mail address to avoid that aliases starting with a space are
     allowed. This fixes http://sourceforge.net/p/postfixadmin/bugs/210/ and
     https://sourceforge.net/p/postfixadmin/feature-requests/113/
-  - update regex in check_domain() to support new, longer TLDs like .photography
+  - update regex in check_domain() to support new, longer TLDs like .international
   - mark vacation_notification.notified field as latin1 to avoid overlong index
   - vacation.pl: encode subject
   - vacation.pl: disable use of TLS by default due to a bug in Mail::Sender 0.8.22
diff --git a/functions.inc.php b/functions.inc.php
index 26db679f..670be5ef 100644
--- a/functions.inc.php
+++ b/functions.inc.php
@@ -229,7 +229,7 @@ function check_domain ($domain)
     global $CONF;
     global $PALANG;
 
-    if (!preg_match ('/^([-0-9A-Z]+\.)+' . '([0-9A-Z]){2,11}$/i', ($domain)))
+    if (!preg_match ('/^([-0-9A-Z]+\.)+' . '([0-9A-Z]){2,13}$/i', ($domain)))
     {
         flash_error(sprintf($PALANG['pInvalidDomainRegex'], htmlentities($domain)));
         return false;