From a8a9ab78610740d2f788acc15f20d147ccba036f Mon Sep 17 00:00:00 2001
From: Graham Campbell <graham@alt-three.com>
Date: Sun, 29 May 2016 10:46:02 +0100
Subject: [PATCH] Made the retry after check stricter

---
 src/Illuminate/Routing/Middleware/ThrottleRequests.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Illuminate/Routing/Middleware/ThrottleRequests.php b/src/Illuminate/Routing/Middleware/ThrottleRequests.php
index 894e9eaa53d0..8cfc54c374ff 100644
--- a/src/Illuminate/Routing/Middleware/ThrottleRequests.php
+++ b/src/Illuminate/Routing/Middleware/ThrottleRequests.php
@@ -119,7 +119,7 @@ protected function addHeaders(Response $response, $maxAttempts, $remainingAttemp
      */
     protected function calculateRemainingAttempts($key, $maxAttempts, $retryAfter = null)
     {
-        if ($retryAfter) {
+        if (! is_null($retryAfter)) {
             return 0;
         }