diff --git a/lib/Config/Populator.php b/lib/Config/Populator.php
index defa4c611a..a17a6ccbcd 100644
--- a/lib/Config/Populator.php
+++ b/lib/Config/Populator.php
@@ -663,7 +663,7 @@ class Populator {
 
   private function scheduleTask($type, $datetime) {
     $task = ScheduledTask::where('type', $type)
-      ->whereRaw('status = ? OR status IS NULL', [ScheduledTask::STATUS_SCHEDULED])
+      ->whereRaw('(status = ? OR status IS NULL)', [ScheduledTask::STATUS_SCHEDULED])
       ->findOne();
     if ($task) {
       return true;