diff --git a/Slim/Http/Headers.php b/Slim/Http/Headers.php
index 6b6375b59..4aa7a5e4d 100644
--- a/Slim/Http/Headers.php
+++ b/Slim/Http/Headers.php
@@ -51,6 +51,7 @@ class Headers extends Collection implements HeadersInterface
     public static function createFromEnvironment(Environment $environment)
     {
         $data = [];
+        $environment = self::determineAuthorization($environment);
         foreach ($environment as $key => $value) {
             $key = strtoupper($key);
             if (isset(static::$special[$key]) || strpos($key, 'HTTP_') === 0) {
@@ -63,6 +64,30 @@ public static function createFromEnvironment(Environment $environment)
         return new static($data);
     }
 
+    /**
+     * If HTTP_AUTHORIZATION does not exist tries to get it from
+     * getallheaders() when available.
+     *
+     * @param Environment $environment The Slim application Environment
+     *
+     * @return Environment
+     */
+
+    public static function determineAuthorization(Environment $environment)
+    {
+        $authorization = $environment->get('HTTP_AUTHORIZATION');
+
+        if (null === $authorization && is_callable('getallheaders')) {
+            $headers = getallheaders();
+            $headers = array_change_key_case($headers, CASE_LOWER);
+            if (isset($headers['authorization'])) {
+                $environment->set('HTTP_AUTHORIZATION', $headers['authorization']);
+            }
+        }
+
+        return $environment;
+    }
+
     /**
      * Return array of HTTP header names and values.
      * This method returns the _original_ header name
diff --git a/tests/Http/HeadersTest.php b/tests/Http/HeadersTest.php
index 345e7620f..9b03197ae 100644
--- a/tests/Http/HeadersTest.php
+++ b/tests/Http/HeadersTest.php
@@ -201,4 +201,14 @@ public function testNormalizeKey()
         $this->assertEquals('foo-bar', $h->normalizeKey('http_foo_bar'));
         $this->assertEquals('foo-bar', $h->normalizeKey('http-foo-bar'));
     }
+
+    public function testDetermineAuthorization()
+    {
+        $e = Environment::mock([]);
+        $en = Headers::determineAuthorization($e);
+        $h = Headers::createFromEnvironment($e);
+
+        $this->assertEquals('electrolytes', $en->get('HTTP_AUTHORIZATION'));
+        $this->assertEquals(['electrolytes'], $h->get('Authorization'));
+    }
 }
diff --git a/tests/Http/RequestTest.php b/tests/Http/RequestTest.php
index 826e2d43f..995e4f05f 100644
--- a/tests/Http/RequestTest.php
+++ b/tests/Http/RequestTest.php
@@ -604,8 +604,8 @@ public function testWithUploadedFiles()
 
     public function testGetServerParams()
     {
-        $mockEnv = Environment::mock();
-        $request = $this->requestFactory();
+        $mockEnv = Environment::mock(["HTTP_AUTHORIZATION" => "test"]);
+        $request = $this->requestFactory(["HTTP_AUTHORIZATION" => "test"]);
 
         $serverParams = $request->getServerParams();
         foreach ($serverParams as $key => $value) {
diff --git a/tests/bootstrap.php b/tests/bootstrap.php
index f12f6eb6a..865e7e45c 100644
--- a/tests/bootstrap.php
+++ b/tests/bootstrap.php
@@ -12,5 +12,7 @@
 /** @var \Composer\Autoload\ClassLoader $autoloader */
 $autoloader = require dirname(__DIR__) . '/vendor/autoload.php';
 
+require dirname(__FILE__) . '/getallheaders.php';
+
 // Register test classes
 $autoloader->addPsr4('Slim\Tests\\', __DIR__);
diff --git a/tests/getallheaders.php b/tests/getallheaders.php
new file mode 100644
index 000000000..b1b188e4c
--- /dev/null
+++ b/tests/getallheaders.php
@@ -0,0 +1,7 @@
+<?php
+if (!function_exists('getallheaders')) {
+    function getallheaders()
+    {
+        return ['Authorization' => 'electrolytes'];
+    }
+}