diff --git a/Classes/Log/Reader/ConjunctionReader.php b/Classes/Log/Reader/ConjunctionReader.php
index <HASH>..<HASH> 100644
--- a/Classes/Log/Reader/ConjunctionReader.php
+++ b/Classes/Log/Reader/ConjunctionReader.php
@@ -132,7 +132,7 @@ class ConjunctionReader implements ReaderInterface
             $logs = array_merge($logs, $reader->findByFilter($filter));
         }
         $orderField = GeneralUtility::underscoredToUpperCamelCase($filter->getOrderField());
-        $direction = 'ASC' === $filter->getOrderDirection() ? -1 : 1;
+        $direction = Filter::SORTING_ASC === $filter->getOrderDirection() ? -1 : 1;
         usort(
             $logs,
             function ($left, $right) use ($orderField, $direction) {
[REFACTOR] Replace external use of string by class constant