diff --git a/typo3/sysext/scheduler/Classes/Task/AbstractTask.php b/typo3/sysext/scheduler/Classes/Task/AbstractTask.php
index e11e76ae28deefea3c09db5a3b494b6ff4d78dd2..fcde4ade0dc78a89e594745b85b77a67266eca30 100644
--- a/typo3/sysext/scheduler/Classes/Task/AbstractTask.php
+++ b/typo3/sysext/scheduler/Classes/Task/AbstractTask.php
@@ -399,7 +399,7 @@ abstract class AbstractTask
         $res = $GLOBALS['TYPO3_DB']->exec_SELECT_queryArray($queryArr);
         $runningExecutions = [];
         if ($row = $GLOBALS['TYPO3_DB']->sql_fetch_assoc($res)) {
-            if ($row['serialized_executions'] !== '') {
+            if (!empty($row['serialized_executions'])) {
                 $runningExecutions = unserialize($row['serialized_executions']);
             }
         }