diff --git a/src/Illuminate/Http/Exceptions/PostTooLargeException.php b/src/Illuminate/Http/Exceptions/PostTooLargeException.php
index 640b8ec74c1a..5c56e3bcaa07 100644
--- a/src/Illuminate/Http/Exceptions/PostTooLargeException.php
+++ b/src/Illuminate/Http/Exceptions/PostTooLargeException.php
@@ -8,7 +8,7 @@
 class PostTooLargeException extends HttpException
 {
     /**
-     * PostTooLargeException constructor.
+     * Create a new "post too large" exception instance.
      *
      * @param  string|null  $message
      * @param  \Exception|null  $previous
diff --git a/src/Illuminate/Http/Exceptions/ThrottleRequestsException.php b/src/Illuminate/Http/Exceptions/ThrottleRequestsException.php
index 4f8d60876ec2..0ba337f6090d 100644
--- a/src/Illuminate/Http/Exceptions/ThrottleRequestsException.php
+++ b/src/Illuminate/Http/Exceptions/ThrottleRequestsException.php
@@ -3,12 +3,12 @@
 namespace Illuminate\Http\Exceptions;
 
 use Exception;
-use Symfony\Component\HttpKernel\Exception\HttpException;
+use Symfony\Component\HttpKernel\Exception\TooManyRequestsHttpException;
 
-class ThrottleRequestsException extends HttpException
+class ThrottleRequestsException extends TooManyRequestsHttpException
 {
     /**
-     * Create a new exception instance.
+     * Create a new throttle requests exception instance.
      *
      * @param  string|null  $message
      * @param  \Exception|null  $previous
@@ -18,6 +18,6 @@ class ThrottleRequestsException extends HttpException
      */
     public function __construct($message = null, Exception $previous = null, array $headers = [], $code = 0)
     {
-        parent::__construct(429, $message, $previous, $headers, $code);
+        parent::__construct(null, $message, $previous, $code, $headers);
     }
 }