diff --git a/workflow/engine/classes/model/CaseScheduler.php b/workflow/engine/classes/model/CaseScheduler.php
index b96926825..fb86245ff 100755
--- a/workflow/engine/classes/model/CaseScheduler.php
+++ b/workflow/engine/classes/model/CaseScheduler.php
@@ -486,7 +486,12 @@ class CaseScheduler extends BaseCaseScheduler
                     $this->updateDate( $sSchedulerUid, $nSchTimeNextRun, $nSchLastRunTime );
                 }
             } elseif ($sActualDataHour == $dActualSysHour && $sActualDataMinutes <= $dActualSysMinutes) {
-                $_PORT = (isset( $_SERVER['SERVER_PORT'] ) && $_SERVER['SERVER_PORT'] != '80') ? ':' . $_SERVER['SERVER_PORT'] : '';
+                $_PORT = '';
+                if ( isset($_SERVER['SERVER_PORT']) ) {
+                    $_PORT = ($_SERVER['SERVER_PORT'] != '80') ? ':' . $_SERVER['SERVER_PORT'] : '';
+                } elseif ( defined('SERVER_PORT') ) {
+                    $_PORT = (SERVER_PORT != '80') ? ':' . SERVER_PORT : '';
+                }
                 //$defaultEndpoint = 'http://' . $_SERVER ['SERVER_NAME'] . ':' . $_PORT . '/sys' . SYS_SYS .'/'.SYS_LANG.'/classic/green/services/wsdl2';
                 $defaultEndpoint = 'http://' . SERVER_NAME . $_PORT . '/sys' . SYS_SYS . '/' . SYS_LANG . '/classic/services/wsdl2';
                 println( " - Connecting webservice: $defaultEndpoint" );