diff --git a/Classes/DataProcessing/CategoriesProcessor.php b/Classes/DataProcessing/CategoriesProcessor.php
index 5b063b63..c6662e5f 100644
--- a/Classes/DataProcessing/CategoriesProcessor.php
+++ b/Classes/DataProcessing/CategoriesProcessor.php
@@ -88,7 +88,7 @@ public function process(
         $queryConfig = [];
 
         $uidInList = (string)$cObj->stdWrapValue('uidInList', $processorConfiguration, '');
-        if (empty($uidInList) === false) {
+        if (!empty($uidInList)) {
             $queryConfig = [
                 'uidInList' => $uidInList,
                 'languageField' => 0,