diff --git a/src/Symfony/Component/HttpFoundation/Request.php b/src/Symfony/Component/HttpFoundation/Request.php
index 098ce6d251e04..e737a7e58c832 100644
--- a/src/Symfony/Component/HttpFoundation/Request.php
+++ b/src/Symfony/Component/HttpFoundation/Request.php
@@ -85,7 +85,7 @@ class Request
     /**
      * Request body parameters ($_POST).
      *
-     * @var InputBag
+     * @var InputBag|ParameterBag
      */
     public $request;
 
@@ -268,7 +268,7 @@ public function __construct(array $query = [], array $request = [], array $attri
      */
     public function initialize(array $query = [], array $request = [], array $attributes = [], array $cookies = [], array $files = [], array $server = [], $content = null)
     {
-        $this->request = new InputBag($request);
+        $this->request = new ParameterBag($request);
         $this->query = new InputBag($query);
         $this->attributes = new ParameterBag($attributes);
         $this->cookies = new InputBag($cookies);
@@ -298,7 +298,9 @@ public static function createFromGlobals()
     {
         $request = self::createRequestFromFactory($_GET, $_POST, [], $_COOKIE, $_FILES, $_SERVER);
 
-        if (0 === strpos($request->headers->get('CONTENT_TYPE'), 'application/x-www-form-urlencoded')
+        if ($_POST) {
+            $request->request = new InputBag($_POST);
+        } elseif (0 === strpos($request->headers->get('CONTENT_TYPE'), 'application/x-www-form-urlencoded')
             && \in_array(strtoupper($request->server->get('REQUEST_METHOD', 'GET')), ['PUT', 'DELETE', 'PATCH'])
         ) {
             parse_str($request->getContent(), $data);
@@ -447,7 +449,7 @@ public function duplicate(array $query = null, array $request = null, array $att
             $dup->query = new InputBag($query);
         }
         if (null !== $request) {
-            $dup->request = new InputBag($request);
+            $dup->request = new ParameterBag($request);
         }
         if (null !== $attributes) {
             $dup->attributes = new ParameterBag($attributes);
diff --git a/src/Symfony/Component/HttpFoundation/Tests/RequestTest.php b/src/Symfony/Component/HttpFoundation/Tests/RequestTest.php
index b8c57fc92418e..99cd54884f51c 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/RequestTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/RequestTest.php
@@ -13,6 +13,8 @@
 
 use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Exception\SuspiciousOperationException;
+use Symfony\Component\HttpFoundation\InputBag;
+use Symfony\Component\HttpFoundation\ParameterBag;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Session\Session;
 use Symfony\Component\HttpFoundation\Session\Storage\MockArraySessionStorage;
@@ -1255,6 +1257,11 @@ public function testCreateFromGlobals($method)
     {
         $normalizedMethod = strtoupper($method);
 
+        $_POST = [];
+        $request = Request::createFromGlobals();
+        $this->assertNotInstanceOf(InputBag::class, $request->request);
+        $this->assertInstanceOf(ParameterBag::class, $request->request);
+
         $_GET['foo1'] = 'bar1';
         $_POST['foo2'] = 'bar2';
         $_COOKIE['foo3'] = 'bar3';
@@ -1267,6 +1274,8 @@ public function testCreateFromGlobals($method)
         $this->assertEquals('bar3', $request->cookies->get('foo3'), '::fromGlobals() uses values from $_COOKIE');
         $this->assertEquals(['bar4'], $request->files->get('foo4'), '::fromGlobals() uses values from $_FILES');
         $this->assertEquals('bar5', $request->server->get('foo5'), '::fromGlobals() uses values from $_SERVER');
+        $this->assertInstanceOf(InputBag::class, $request->request);
+        $this->assertInstanceOf(ParameterBag::class, $request->request);
 
         unset($_GET['foo1'], $_POST['foo2'], $_COOKIE['foo3'], $_FILES['foo4'], $_SERVER['foo5']);
 
@@ -1275,6 +1284,8 @@ public function testCreateFromGlobals($method)
         $request = RequestContentProxy::createFromGlobals();
         $this->assertEquals($normalizedMethod, $request->getMethod());
         $this->assertEquals('mycontent', $request->request->get('content'));
+        $this->assertInstanceOf(InputBag::class, $request->request);
+        $this->assertInstanceOf(ParameterBag::class, $request->request);
 
         unset($_SERVER['REQUEST_METHOD'], $_SERVER['CONTENT_TYPE']);