diff --git a/Classes/Frontend/DataProcessing/NaturalSortingProcessor.php b/Classes/Frontend/DataProcessing/NaturalSortingProcessor.php
index 54bc41d..f5244c3 100644
--- a/Classes/Frontend/DataProcessing/NaturalSortingProcessor.php
+++ b/Classes/Frontend/DataProcessing/NaturalSortingProcessor.php
@@ -60,6 +60,10 @@ class NaturalSortingProcessor implements DataProcessorInterface
         }
 
         $valuesToSort = ArrayUtility::getValueByPath($processedData, $variablePath);
+        if (is_array($valuesToSort) === false) {
+            throw new \Exception('Variable at "' . $variablePath . '" was not of type array.', 1667911071);
+        }
+
         usort($valuesToSort, function (array $variable1, array $variable2) use ($variableSubPath) {
             $value1 = ArrayUtility::getValueByPath($variable1, $variableSubPath);
             $value2 = ArrayUtility::getValueByPath($variable2, $variableSubPath);