diff --git a/src/core/etl/src/Flow/ETL/Row/Reference/Expression/Cast.php b/src/core/etl/src/Flow/ETL/Row/Reference/Expression/Cast.php
index 3cd5d0bc2..13412db7f 100644
--- a/src/core/etl/src/Flow/ETL/Row/Reference/Expression/Cast.php
+++ b/src/core/etl/src/Flow/ETL/Row/Reference/Expression/Cast.php
@@ -91,9 +91,7 @@ private function toString(mixed $value) : ?string
         }
 
         if ($value instanceof \DOMDocument) {
-            $xml = $value->saveXML();
-
-            return false === $xml ? null : $xml;
+            return $value->saveXML() ?: null;
         }
 
         /** @phpstan-ignore-next-line */