diff --git a/Classes/Frontend/DataProcessing/NaturalSortingProcessor.php b/Classes/Frontend/DataProcessing/NaturalSortingProcessor.php
index f5244c3..27b5541 100644
--- a/Classes/Frontend/DataProcessing/NaturalSortingProcessor.php
+++ b/Classes/Frontend/DataProcessing/NaturalSortingProcessor.php
@@ -64,6 +64,10 @@ class NaturalSortingProcessor implements DataProcessorInterface
             throw new \Exception('Variable at "' . $variablePath . '" was not of type array.', 1667911071);
         }
 
+        $valuesToSort = array_filter($valuesToSort, function (array $value) use ($variableSubPath) {
+            return ArrayUtility::getValueByPath($value, $variableSubPath);
+        });
+
         usort($valuesToSort, function (array $variable1, array $variable2) use ($variableSubPath) {
             $value1 = ArrayUtility::getValueByPath($variable1, $variableSubPath);
             $value2 = ArrayUtility::getValueByPath($variable2, $variableSubPath);