diff --git a/workflow/public_html/sysGeneric.php b/workflow/public_html/sysGeneric.php
index 5f04fe899..7f288c059 100644
--- a/workflow/public_html/sysGeneric.php
+++ b/workflow/public_html/sysGeneric.php
@@ -448,7 +448,11 @@ define('PATH_DYNAFORM', PATH_DATA_SITE . 'xmlForms/');
 define('PATH_IMAGES_ENVIRONMENT_FILES', PATH_DATA_SITE . 'usersFiles' . PATH_SEP);
 define('PATH_IMAGES_ENVIRONMENT_USERS', PATH_DATA_SITE . 'usersPhotographies' . PATH_SEP);
 define('SERVER_NAME', $_SERVER['SERVER_NAME']);
-define('SERVER_PORT', $_SERVER['SERVER_PORT']);
+
+$hostParts = explode(':', $_SERVER['HTTP_HOST'] ?? '');
+$port = isset($hostParts[1]) && is_numeric($hostParts[1]) ? (int)$hostParts[1] : $_SERVER['SERVER_PORT'];
+
+define('SERVER_PORT', $port);
 
 // create memcached singleton
 $memcache = PMmemcached::getSingleton(config("system.workspace"));