diff --git a/typo3/sysext/form/Classes/Domain/Finishers/AbstractFinisher.php b/typo3/sysext/form/Classes/Domain/Finishers/AbstractFinisher.php
index c7c69c2573a61de2b639ab442f3a04fefdc87130..b5a2cc9e7ccd585691c366318ae5c7c170662c40 100644
--- a/typo3/sysext/form/Classes/Domain/Finishers/AbstractFinisher.php
+++ b/typo3/sysext/form/Classes/Domain/Finishers/AbstractFinisher.php
@@ -205,7 +205,7 @@ abstract class AbstractFinisher implements FinisherInterface
                     );
                 }
             }
-            if (!is_string($value) && !is_int($value)) {
+            if (!is_string($value) && !is_numeric($value)) {
                 $value = '{' . $match[1] . '}';
             }
             return $value;