diff --git a/include/class.queue.php b/include/class.queue.php
index 24b9d33e07d5368d72eb5ebe23a05794055a5617..b4343d43eb17a622c1af41083ed79fa4cb819b3e 100644
--- a/include/class.queue.php
+++ b/include/class.queue.php
@@ -2826,7 +2826,8 @@ extends QueueColumnFilter {
     static $desc = /* @trans */ "Date and Time";
 
     function filter($text, $row) {
-        return $text->changeTo(Format::datetime($text->value));
+        return $text ?
+            $text->changeTo(Format::datetime($text->value)) : '';
     }
 }