diff --git a/Classes/Service/ConfigurationService.php b/Classes/Service/ConfigurationService.php
index 1c0a6a6c7..c997f25ae 100644
--- a/Classes/Service/ConfigurationService.php
+++ b/Classes/Service/ConfigurationService.php
@@ -434,7 +434,10 @@ private function extractParamsFromCustomTable(
 
             if (!empty($addTable)) {
                 // TODO: Check if this works as intended!
-                $queryBuilder->add('from', $addTable);
+                $addTables = GeneralUtility::trimExplode(',', $addTable, true);
+                foreach ($addTables as $table) {
+                    $queryBuilder->from($table);
+                }
             }
             $transOrigPointerField = $GLOBALS['TCA'][$subpartParams['_TABLE']]['ctrl']['transOrigPointerField'] ?? false;