diff --git a/modules/openapi-generator/src/main/resources/php-symfony/model_generic.mustache b/modules/openapi-generator/src/main/resources/php-symfony/model_generic.mustache
index 15b9cedab67..54b34b9f903 100644
--- a/modules/openapi-generator/src/main/resources/php-symfony/model_generic.mustache
+++ b/modules/openapi-generator/src/main/resources/php-symfony/model_generic.mustache
@@ -35,7 +35,7 @@ class {{classname}} {{#parentSchema}}extends {{{parent}}} {{/parentSchema}}
      *
      * @return $this
      */
-    public function {{setter}}({{#vendorExtensions.x-parameter-type}}{{vendorExtensions.x-parameter-type}} {{/vendorExtensions.x-parameter-type}}${{name}}{{^required}} = null{{/required}}){{#vendorExtensions.x-parameter-type}}: {{^required}}?{{/required}}{{vendorExtensions.x-parameter-type}}{{/vendorExtensions.x-parameter-type}}
+    public function {{setter}}({{#vendorExtensions.x-parameter-type}}{{vendorExtensions.x-parameter-type}} {{/vendorExtensions.x-parameter-type}}${{name}}{{^required}} = null{{/required}})
     {
         $this->{{name}} = ${{name}};
 
diff --git a/samples/server/petstore/php-symfony/SymfonyBundle-php/Model/Order.php b/samples/server/petstore/php-symfony/SymfonyBundle-php/Model/Order.php
index 1dce20ccc27..c79445f90cf 100644
--- a/samples/server/petstore/php-symfony/SymfonyBundle-php/Model/Order.php
+++ b/samples/server/petstore/php-symfony/SymfonyBundle-php/Model/Order.php
@@ -197,7 +197,7 @@ class Order
      *
      * @return $this
      */
-    public function setShipDate(\DateTime $shipDate = null): ?\DateTime
+    public function setShipDate(\DateTime $shipDate = null)
     {
         $this->shipDate = $shipDate;
 
diff --git a/samples/server/petstore/php-symfony/SymfonyBundle-php/Model/Pet.php b/samples/server/petstore/php-symfony/SymfonyBundle-php/Model/Pet.php
index cd9d321ca4a..d97cfb942a4 100644
--- a/samples/server/petstore/php-symfony/SymfonyBundle-php/Model/Pet.php
+++ b/samples/server/petstore/php-symfony/SymfonyBundle-php/Model/Pet.php
@@ -155,7 +155,7 @@ class Pet
      *
      * @return $this
      */
-    public function setCategory(Category $category = null): ?Category
+    public function setCategory(Category $category = null)
     {
         $this->category = $category;
 
@@ -203,7 +203,7 @@ class Pet
      *
      * @return $this
      */
-    public function setPhotoUrls(array $photoUrls): array
+    public function setPhotoUrls(array $photoUrls)
     {
         $this->photoUrls = $photoUrls;
 
@@ -227,7 +227,7 @@ class Pet
      *
      * @return $this
      */
-    public function setTags(array $tags = null): ?array
+    public function setTags(array $tags = null)
     {
         $this->tags = $tags;