diff --git a/cronjobs/archive_cleanup.php b/cronjobs/archive_cleanup.php
index 4d7b011b..687d41c7 100755
--- a/cronjobs/archive_cleanup.php
+++ b/cronjobs/archive_cleanup.php
@@ -26,7 +26,8 @@ chdir(dirname(__FILE__));
 require_once('shared.inc.php');
 
 // If we don't keep archives, delete some now to release disk space
-if (!$affected_rows = $share->purgeArchive()) {
+$affected_rows = $share->purgeArchive();
+if ($affected_rows === false) {
   $log->logError("Failed to delete archived shares, not critical but should be checked: " . $share->getCronError());
   $monitoring->endCronjob($cron_name, 'E0008', 1, true);
 } else {