diff --git a/src/Symfony/Component/Form/NativeRequestHandler.php b/src/Symfony/Component/Form/NativeRequestHandler.php
index 6b18df44a165d..b9d0c879caae4 100644
--- a/src/Symfony/Component/Form/NativeRequestHandler.php
+++ b/src/Symfony/Component/Form/NativeRequestHandler.php
@@ -198,6 +198,8 @@ private static function fixPhpFilesArray($data)
             return $data;
         }
 
+        // Remove extra key added by PHP 8.1.
+        unset($data['full_path']);
         $keys = array_keys($data);
         sort($keys);