diff --git a/Classes/Form/Transformation/DataTransformerRegistry.php b/Classes/Form/Transformation/DataTransformerRegistry.php
index c833e3b0d..7d3ca48c9 100644
--- a/Classes/Form/Transformation/DataTransformerRegistry.php
+++ b/Classes/Form/Transformation/DataTransformerRegistry.php
@@ -10,6 +10,7 @@
  */
 
 use Symfony\Component\DependencyInjection\ServiceLocator;
+use TYPO3\CMS\Core\Utility\GeneralUtility;
 
 class DataTransformerRegistry
 {
@@ -18,6 +19,8 @@ class DataTransformerRegistry
      */
     private array $transformers = [];
 
+    private static array $legacy = [];
+
     public function __construct(ServiceLocator $locator)
     {
         /** @var DataTransformerInterface[] $transformers */
@@ -31,6 +34,11 @@ function (DataTransformerInterface $a, DataTransformerInterface $b) {
         );
     }
 
+    public static function registerTransformerOnLegacyPhpVersion(string $transformerClassName): void
+    {
+        self::$legacy[] = $transformerClassName;
+    }
+
     public function resolveDataTransformerByType(string $type): DataTransformerInterface
     {
         foreach ($this->transformers as $transformer) {
@@ -39,6 +47,15 @@ public function resolveDataTransformerByType(string $type): DataTransformerInter
             }
         }
 
+        /** @var class-string $legacyClassName */
+        foreach (self::$legacy as $legacyClassName) {
+            /** @var DataTransformerInterface $transformer */
+            $transformer = GeneralUtility::makeInstance($legacyClassName);
+            if ($transformer->canTransformToType($type)) {
+                return $transformer;
+            }
+        }
+
         throw new \InvalidArgumentException(
             'Flux could not resolve a data transformer for type "' . $type . '"',
             1720346755
diff --git a/Configuration/Services.yaml b/Configuration/Services.yaml
index efe075744..3683f3da8 100644
--- a/Configuration/Services.yaml
+++ b/Configuration/Services.yaml
@@ -24,6 +24,10 @@ services:
     arguments:
       $locator: !tagged_locator { tag: 'flux.datatransformer', index_by: 'identifier' }
 
+  # This entry only exists for PHP <8 to be able to load FileTransformer. Don't rely on being able to construct this!
+  FluidTYPO3\Flux\Form\Transformation\Transformer\FileTransformer:
+    public: true
+
   FluidTYPO3\Flux\Integration\HookSubscribers\ColumnPositionItems:
     public: true
   FluidTYPO3\Flux\Backend\BackendLayoutDataProvider:
diff --git a/ext_localconf.php b/ext_localconf.php
index 9b3e7124a..8ddbed543 100644
--- a/ext_localconf.php
+++ b/ext_localconf.php
@@ -44,6 +44,15 @@
 
         $GLOBALS['TYPO3_CONF_VARS']['FE']['addRootLineFields'] .= ($GLOBALS['TYPO3_CONF_VARS']['FE']['addRootLineFields'] == '' ? '' : ',') .
             'tx_fed_page_controller_action,tx_fed_page_controller_action_sub,tx_fed_page_flexform,tx_fed_page_flexform_sub,';
+        if (version_compare((string) PHP_MAJOR_VERSION, '8.0', '<')) {
+            \FluidTYPO3\Flux\Form\Transformation\DataTransformerRegistry::registerTransformerOnLegacyPhpVersion(\FluidTYPO3\Flux\Form\Transformation\Transformer\ArrayTransformer::class);
+            \FluidTYPO3\Flux\Form\Transformation\DataTransformerRegistry::registerTransformerOnLegacyPhpVersion(\FluidTYPO3\Flux\Form\Transformation\Transformer\BooleanTransformer::class);
+            \FluidTYPO3\Flux\Form\Transformation\DataTransformerRegistry::registerTransformerOnLegacyPhpVersion(\FluidTYPO3\Flux\Form\Transformation\Transformer\FileTransformer::class);
+            \FluidTYPO3\Flux\Form\Transformation\DataTransformerRegistry::registerTransformerOnLegacyPhpVersion(\FluidTYPO3\Flux\Form\Transformation\Transformer\FloatTransformer::class);
+            \FluidTYPO3\Flux\Form\Transformation\DataTransformerRegistry::registerTransformerOnLegacyPhpVersion(\FluidTYPO3\Flux\Form\Transformation\Transformer\FunctionCallTransformer::class);
+            \FluidTYPO3\Flux\Form\Transformation\DataTransformerRegistry::registerTransformerOnLegacyPhpVersion(\FluidTYPO3\Flux\Form\Transformation\Transformer\IntegerTransformer::class);
+            \FluidTYPO3\Flux\Form\Transformation\DataTransformerRegistry::registerTransformerOnLegacyPhpVersion(\FluidTYPO3\Flux\Form\Transformation\Transformer\ObjectTransformer::class);
+        }
     }
 
     $GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['ext/install']['update'][\FluidTYPO3\Flux\Updates\MigrateColPosWizard::class]