diff --git a/src/Annotations/Schema.php b/src/Annotations/Schema.php
index b52a47128..1fff1a02c 100644
--- a/src/Annotations/Schema.php
+++ b/src/Annotations/Schema.php
@@ -266,6 +266,7 @@ class Schema extends AbstractAnnotation
 
     /**
      * A free-form property to include an example of an instance for this schema.
+     *
      * To represent examples that cannot be naturally represented in JSON or YAML, a string value can be used to
      * contain the example with escaping where necessary.
      */
diff --git a/src/Attributes/Items.php b/src/Attributes/Items.php
index fd40055c8..92775a332 100644
--- a/src/Attributes/Items.php
+++ b/src/Attributes/Items.php
@@ -29,7 +29,7 @@ public function __construct(
         ?string $format = null,
         ?Items $items = null,
         ?string $collectionFormat = null,
-        $default = null,
+        $default = Generator::UNDEFINED,
         $maximum = null,
         ?bool $exclusiveMaximum = null,
         $minimum = null,
@@ -46,7 +46,7 @@ public function __construct(
         ?bool $writeOnly = null,
         ?Xml $xml = null,
         ?ExternalDocumentation $externalDocs = null,
-        $example = null,
+        $example = Generator::UNDEFINED,
         ?bool $nullable = null,
         ?bool $deprecated = null,
         ?array $allOf = null,
@@ -68,7 +68,7 @@ public function __construct(
             'type' => $type ?? Generator::UNDEFINED,
             'format' => $format ?? Generator::UNDEFINED,
             'collectionFormat' => $collectionFormat ?? Generator::UNDEFINED,
-            'default' => $default ?? Generator::UNDEFINED,
+            'default' => $default,
             'maximum' => $maximum ?? Generator::UNDEFINED,
             'exclusiveMaximum' => $exclusiveMaximum ?? Generator::UNDEFINED,
             'minimum' => $minimum ?? Generator::UNDEFINED,
@@ -83,7 +83,7 @@ public function __construct(
             'readOnly' => $readOnly ?? Generator::UNDEFINED,
             'writeOnly' => $writeOnly ?? Generator::UNDEFINED,
             'xml' => $xml ?? Generator::UNDEFINED,
-            'example' => $example ?? Generator::UNDEFINED,
+            'example' => $example,
             'nullable' => $nullable ?? Generator::UNDEFINED,
             'deprecated' => $deprecated ?? Generator::UNDEFINED,
             'allOf' => $allOf ?? Generator::UNDEFINED,
diff --git a/src/Attributes/JsonContent.php b/src/Attributes/JsonContent.php
index 2d4961943..54be25c5e 100644
--- a/src/Attributes/JsonContent.php
+++ b/src/Attributes/JsonContent.php
@@ -31,7 +31,7 @@ public function __construct(
         ?string $format = null,
         ?Items $items = null,
         ?string $collectionFormat = null,
-        $default = null,
+        $default = Generator::UNDEFINED,
         $maximum = null,
         ?bool $exclusiveMaximum = null,
         $minimum = null,
@@ -48,7 +48,7 @@ public function __construct(
         ?bool $writeOnly = null,
         ?Xml $xml = null,
         ?ExternalDocumentation $externalDocs = null,
-        $example = null,
+        $example = Generator::UNDEFINED,
         ?bool $nullable = null,
         ?bool $deprecated = null,
         ?array $allOf = null,
@@ -71,7 +71,7 @@ public function __construct(
             'type' => $type ?? Generator::UNDEFINED,
             'format' => $format ?? Generator::UNDEFINED,
             'collectionFormat' => $collectionFormat ?? Generator::UNDEFINED,
-            'default' => $default ?? Generator::UNDEFINED,
+            'default' => $default,
             'maximum' => $maximum ?? Generator::UNDEFINED,
             'exclusiveMaximum' => $exclusiveMaximum ?? Generator::UNDEFINED,
             'minimum' => $minimum ?? Generator::UNDEFINED,
@@ -86,7 +86,7 @@ public function __construct(
             'readOnly' => $readOnly ?? Generator::UNDEFINED,
             'writeOnly' => $writeOnly ?? Generator::UNDEFINED,
             'xml' => $xml ?? Generator::UNDEFINED,
-            'example' => $example ?? Generator::UNDEFINED,
+            'example' => $example,
             'nullable' => $nullable ?? Generator::UNDEFINED,
             'deprecated' => $deprecated ?? Generator::UNDEFINED,
             'allOf' => $allOf ?? Generator::UNDEFINED,
diff --git a/src/Attributes/MediaType.php b/src/Attributes/MediaType.php
index 0f2e0b20e..31668a2df 100644
--- a/src/Attributes/MediaType.php
+++ b/src/Attributes/MediaType.php
@@ -19,7 +19,7 @@ class MediaType extends \OpenApi\Annotations\MediaType
     public function __construct(
         ?string $mediaType = null,
         ?Schema $schema = null,
-        $example = null,
+        $example = Generator::UNDEFINED,
         ?array $examples = null,
         ?string $encoding = null,
         // annotation
@@ -28,7 +28,7 @@ public function __construct(
     ) {
         parent::__construct([
                 'mediaType' => $mediaType ?? Generator::UNDEFINED,
-                'example' => $example ?? Generator::UNDEFINED,
+                'example' => $example,
                 'encoding' => $encoding ?? Generator::UNDEFINED,
                 'x' => $x ?? Generator::UNDEFINED,
                 'value' => $this->combine($schema, $examples, $attachables),
diff --git a/src/Attributes/Property.php b/src/Attributes/Property.php
index 595b2bcc3..9aa91a9d5 100644
--- a/src/Attributes/Property.php
+++ b/src/Attributes/Property.php
@@ -30,7 +30,7 @@ public function __construct(
         ?string $format = null,
         ?Items $items = null,
         ?string $collectionFormat = null,
-        $default = null,
+        $default = Generator::UNDEFINED,
         $maximum = null,
         ?bool $exclusiveMaximum = null,
         $minimum = null,
@@ -47,7 +47,7 @@ public function __construct(
         ?bool $writeOnly = null,
         ?Xml $xml = null,
         ?ExternalDocumentation $externalDocs = null,
-        $example = null,
+        $example = Generator::UNDEFINED,
         ?bool $nullable = null,
         ?bool $deprecated = null,
         ?array $allOf = null,
@@ -70,8 +70,7 @@ public function __construct(
             'type' => $type ?? Generator::UNDEFINED,
             'format' => $format ?? Generator::UNDEFINED,
             'collectionFormat' => $collectionFormat ?? Generator::UNDEFINED,
-
-            'default' => $default ?? Generator::UNDEFINED,
+            'default' => $default,
             'maximum' => $maximum ?? Generator::UNDEFINED,
             'exclusiveMaximum' => $exclusiveMaximum ?? Generator::UNDEFINED,
             'minimum' => $minimum ?? Generator::UNDEFINED,
@@ -81,13 +80,12 @@ public function __construct(
             'maxItems' => $maxItems ?? Generator::UNDEFINED,
             'minItems' => $minItems ?? Generator::UNDEFINED,
             'uniqueItems' => $uniqueItems ?? Generator::UNDEFINED,
-
             'pattern' => $pattern ?? Generator::UNDEFINED,
             'enum' => $enum ?? Generator::UNDEFINED,
             'readOnly' => $readOnly ?? Generator::UNDEFINED,
             'writeOnly' => $writeOnly ?? Generator::UNDEFINED,
             'xml' => $xml ?? Generator::UNDEFINED,
-            'example' => $example ?? Generator::UNDEFINED,
+            'example' => $example,
             'nullable' => $nullable ?? Generator::UNDEFINED,
             'deprecated' => $deprecated ?? Generator::UNDEFINED,
             'allOf' => $allOf ?? Generator::UNDEFINED,
diff --git a/src/Attributes/Schema.php b/src/Attributes/Schema.php
index 14c07f01d..9c217de74 100644
--- a/src/Attributes/Schema.php
+++ b/src/Attributes/Schema.php
@@ -29,7 +29,7 @@ public function __construct(
         ?string $format = null,
         ?Items $items = null,
         ?string $collectionFormat = null,
-        $default = null,
+        $default = Generator::UNDEFINED,
         $maximum = null,
         ?bool $exclusiveMaximum = null,
         $minimum = null,
@@ -46,7 +46,7 @@ public function __construct(
         ?bool $writeOnly = null,
         ?Xml $xml = null,
         ?ExternalDocumentation $externalDocs = null,
-        $example = null,
+        $example = Generator::UNDEFINED,
         ?bool $nullable = null,
         ?bool $deprecated = null,
         ?array $allOf = null,
@@ -67,7 +67,7 @@ public function __construct(
             'type' => $type ?? Generator::UNDEFINED,
             'format' => $format ?? Generator::UNDEFINED,
             'collectionFormat' => $collectionFormat ?? Generator::UNDEFINED,
-            'default' => $default ?? Generator::UNDEFINED,
+            'default' => $default,
             'maximum' => $maximum ?? Generator::UNDEFINED,
             'exclusiveMaximum' => $exclusiveMaximum ?? Generator::UNDEFINED,
             'minimum' => $minimum ?? Generator::UNDEFINED,
@@ -82,7 +82,7 @@ public function __construct(
             'readOnly' => $readOnly ?? Generator::UNDEFINED,
             'writeOnly' => $writeOnly ?? Generator::UNDEFINED,
             'xml' => $xml ?? Generator::UNDEFINED,
-            'example' => $example ?? Generator::UNDEFINED,
+            'example' => $example,
             'nullable' => $nullable ?? Generator::UNDEFINED,
             'deprecated' => $deprecated ?? Generator::UNDEFINED,
             'allOf' => $allOf ?? Generator::UNDEFINED,
diff --git a/src/Attributes/XmlContent.php b/src/Attributes/XmlContent.php
index 94dec7818..b73de7750 100644
--- a/src/Attributes/XmlContent.php
+++ b/src/Attributes/XmlContent.php
@@ -31,7 +31,7 @@ public function __construct(
         ?string $format = null,
         ?Items $items = null,
         ?string $collectionFormat = null,
-        $default = null,
+        $default = Generator::UNDEFINED,
         $maximum = null,
         ?bool $exclusiveMaximum = null,
         $minimum = null,
@@ -48,7 +48,7 @@ public function __construct(
         ?bool $writeOnly = null,
         ?Xml $xml = null,
         ?ExternalDocumentation $externalDocs = null,
-        $example = null,
+        $example = Generator::UNDEFINED,
         ?bool $nullable = null,
         ?bool $deprecated = null,
         ?array $allOf = null,
@@ -71,7 +71,7 @@ public function __construct(
             'type' => $type ?? Generator::UNDEFINED,
             'format' => $format ?? Generator::UNDEFINED,
             'collectionFormat' => $collectionFormat ?? Generator::UNDEFINED,
-            'default' => $default ?? Generator::UNDEFINED,
+            'default' => $default,
             'maximum' => $maximum ?? Generator::UNDEFINED,
             'exclusiveMaximum' => $exclusiveMaximum ?? Generator::UNDEFINED,
             'minimum' => $minimum ?? Generator::UNDEFINED,
@@ -86,7 +86,7 @@ public function __construct(
             'readOnly' => $readOnly ?? Generator::UNDEFINED,
             'writeOnly' => $writeOnly ?? Generator::UNDEFINED,
             'xml' => $xml ?? Generator::UNDEFINED,
-            'example' => $example ?? Generator::UNDEFINED,
+            'example' => $example,
             'nullable' => $nullable ?? Generator::UNDEFINED,
             'deprecated' => $deprecated ?? Generator::UNDEFINED,
             'allOf' => $allOf ?? Generator::UNDEFINED,
diff --git a/tests/Fixtures/Apis/Attributes/basic.php b/tests/Fixtures/Apis/Attributes/basic.php
index ee3d666db..59dee3aaf 100644
--- a/tests/Fixtures/Apis/Attributes/basic.php
+++ b/tests/Fixtures/Apis/Attributes/basic.php
@@ -64,7 +64,7 @@ class Product implements ProductInterface
 
     public function __construct(
         #[OAT\Property()] public int $quantity,
-        #[OAT\Property()] public string $brand,
+        #[OAT\Property(nullable: true, default: null, example: null)] public string $brand,
         #[OAT\Property()] public Colour $colour,
         #[OAT\Property(type: 'string')] public \DateTimeInterface $releasedAt,
     ) {
diff --git a/tests/Fixtures/Apis/DocBlocks/basic.php b/tests/Fixtures/Apis/DocBlocks/basic.php
index 79ef3037c..922d4ac20 100644
--- a/tests/Fixtures/Apis/DocBlocks/basic.php
+++ b/tests/Fixtures/Apis/DocBlocks/basic.php
@@ -85,7 +85,7 @@ class Product implements ProductInterface
     /** @OA\Property */
     public int $quantity;
 
-    /** @OA\Property */
+    /** @OA\Property(nullable=true, default=null, example=null) */
     public string $brand;
 
     /** @OA\Property */
diff --git a/tests/Fixtures/Apis/Mixed/basic.php b/tests/Fixtures/Apis/Mixed/basic.php
index 90e9b7763..85bef7b48 100644
--- a/tests/Fixtures/Apis/Mixed/basic.php
+++ b/tests/Fixtures/Apis/Mixed/basic.php
@@ -78,7 +78,7 @@ class Product implements ProductInterface
     #[OAT\Property()]
     public int $quantity;
 
-    #[OAT\Property()]
+    #[OAT\Property(nullable: true, default: null, example: null)]
     public string $brand;
 
     /** @OA\Property */
diff --git a/tests/Fixtures/Apis/basic.yaml b/tests/Fixtures/Apis/basic.yaml
index d579b1264..a0402c036 100644
--- a/tests/Fixtures/Apis/basic.yaml
+++ b/tests/Fixtures/Apis/basic.yaml
@@ -108,7 +108,11 @@ components:
             quantity:
               type: integer
             brand:
-              type: string
+              type:
+                - string
+                - 'null'
+              default: null
+              example: null
             colour:
               $ref: '#/components/schemas/Colour'
             id: