diff --git a/classes/cronlog-renderer.class.php b/classes/cronlog-renderer.class.php
index 874ff217fa2f21d16b6c3046c6343a1cb41d93b9..388820040cb3430809a3cb10e2d8cced08d55c1c 100644
--- a/classes/cronlog-renderer.class.php
+++ b/classes/cronlog-renderer.class.php
@@ -209,6 +209,13 @@ class cronlogrenderer extends cronlog{
                 $bIsRunning=true;
                 $sColStatus.=$this->t('status-running');
             }
+
+            // execution time of time of currently running job
+            $iExectime=$aEntry['SCRIPTEXECTIME']
+                    ? (int)$aEntry['SCRIPTEXECTIME']
+                    : date('U')-$aEntry['SCRIPTSTARTTIME']
+                    ;
+
             // render table of last logfile per cron job
             $sHtml.='<tr onclick="showFile(\''.$aEntry['logfile'].'\');" title="'.sprintf($this->t('row-click-show-logfile'), $aEntry['logfile']).'"'
                         .($bIsRunning ? ' class="message-running"' : '')
@@ -218,11 +225,12 @@ class cronlogrenderer extends cronlog{
                     . '<td>'.$aEntry['SCRIPTLABEL'].'</td>'
                     . '<td>'.$aEntry['server'].'</td>'
                     . '<td'
-                        .($aEntry['SCRIPTEXECTIME']>$this->_iMinTime4Timeline ? ' class="message-warning"' : '' )
+                        .((int)$aEntry['SCRIPTEXECTIME']>$this->_iMinTime4Timeline ? ' class="message-warning"' : '' )
                     . '>'
                         .'<span style="display: none">'.str_pad((int)$aEntry['SCRIPTEXECTIME'], 6, '0', STR_PAD_LEFT).'</span>'
-                        .(int)$aEntry['SCRIPTEXECTIME'].'s'
-                        .((int)$aEntry['SCRIPTEXECTIME']>100 ? ' ('.round((int)$aEntry['SCRIPTEXECTIME']/60).'min)' : '') 
+                        
+                        .$iExectime.'s'
+                        .($iExectime>100 ? ' ('.round($iExectime/60).'min)' : '') 
                         .'</td>'
                     . '<td'
                         .($aEntry['SCRIPTTTL']<$this->_iMinTtl ? ' class="message-warning" title="(using minimal TTL = '.$this->_iMinTtl.' min)"' : '')