diff --git a/typo3/sysext/frontend/Classes/DataProcessing/FilesProcessor.php b/typo3/sysext/frontend/Classes/DataProcessing/FilesProcessor.php
index a611da84f9f5ecb4cd9e67f88993e15d337b3514..11265d179b667dd93f739d29658d8a27a08bdde3 100644
--- a/typo3/sysext/frontend/Classes/DataProcessing/FilesProcessor.php
+++ b/typo3/sysext/frontend/Classes/DataProcessing/FilesProcessor.php
@@ -92,7 +92,7 @@ class FilesProcessor implements DataProcessorInterface
         // collections
         $collections = $cObj->stdWrapValue('collections', $processorConfiguration ?? []);
         if (!empty($collections)) {
-            $collections = GeneralUtility::trimExplode(',', (string)$collections, true);
+            $collections = GeneralUtility::intExplode(',', (string)$collections, true);
             $fileCollector->addFilesFromFileCollections($collections);
         }