diff --git a/src/Metadata/Extractor/XmlResourceExtractor.php b/src/Metadata/Extractor/XmlResourceExtractor.php
index 7f6c037450..85dc61fdf4 100644
--- a/src/Metadata/Extractor/XmlResourceExtractor.php
+++ b/src/Metadata/Extractor/XmlResourceExtractor.php
@@ -224,12 +224,12 @@ private function buildOpenapi(\SimpleXMLElement $resource): bool|OpenApiOperatio
                     in: $this->phpize($parameter, 'in', 'string'),
                     description: $this->phpize($parameter, 'description', 'string'),
                     required: $this->phpize($parameter, 'required', 'bool'),
-                    deprecated: $this->phpize($parameter, 'deprecated', 'bool'),
-                    allowEmptyValue: $this->phpize($parameter, 'allowEmptyValue', 'bool'),
-                    schema: isset($parameter->schema->values) ? $this->buildValues($parameter->schema->values) : null,
+                    deprecated: $this->phpize($parameter, 'deprecated', 'bool', false),
+                    allowEmptyValue: $this->phpize($parameter, 'allowEmptyValue', 'bool', null),
+                    schema: isset($parameter->schema->values) ? $this->buildValues($parameter->schema->values) : [],
                     style: $this->phpize($parameter, 'style', 'string'),
-                    explode: $this->phpize($parameter, 'explode', 'bool'),
-                    allowReserved: $this->phpize($parameter, 'allowReserved', 'bool'),
+                    explode: $this->phpize($parameter, 'explode', 'bool', false),
+                    allowReserved: $this->phpize($parameter, 'allowReserved', 'bool', null),
                     example: $this->phpize($parameter, 'example', 'string'),
                     examples: isset($parameter->examples->values) ? new \ArrayObject($this->buildValues($parameter->examples->values)) : null,
                     content: isset($parameter->content->values) ? new \ArrayObject($this->buildValues($parameter->content->values)) : null,
diff --git a/src/OpenApi/Model/Parameter.php b/src/OpenApi/Model/Parameter.php
index 918da61514..793e582b43 100644
--- a/src/OpenApi/Model/Parameter.php
+++ b/src/OpenApi/Model/Parameter.php
@@ -17,7 +17,7 @@ final class Parameter
 {
     use ExtensionTrait;
 
-    public function __construct(private string $name, private string $in, private string $description = '', private bool $required = false, private bool $deprecated = false, private bool $allowEmptyValue = false, private array $schema = [], private ?string $style = null, private bool $explode = false, private bool $allowReserved = false, private $example = null, private ?\ArrayObject $examples = null, private ?\ArrayObject $content = null)
+    public function __construct(private string $name, private string $in, private string $description = '', private bool $required = false, private bool $deprecated = false, private ?bool $allowEmptyValue = false, private array $schema = [], private ?string $style = null, private bool $explode = false, private ?bool $allowReserved = false, private $example = null, private ?\ArrayObject $examples = null, private ?\ArrayObject $content = null)
     {
         if (null === $style) {
             if ('query' === $in || 'cookie' === $in) {
@@ -148,7 +148,7 @@ public function withDeprecated(bool $deprecated): self
         return $clone;
     }
 
-    public function withAllowEmptyValue(bool $allowEmptyValue): self
+    public function withAllowEmptyValue(?bool $allowEmptyValue): self
     {
         $clone = clone $this;
         $clone->allowEmptyValue = $allowEmptyValue;
@@ -180,7 +180,7 @@ public function withExplode(bool $explode): self
         return $clone;
     }
 
-    public function withAllowReserved(bool $allowReserved): self
+    public function withAllowReserved(?bool $allowReserved): self
     {
         $clone = clone $this;
         $clone->allowReserved = $allowReserved;