diff --git a/src/Illuminate/Mail/MailManager.php b/src/Illuminate/Mail/MailManager.php
index 0ae4aeac2192..03edae29bfcd 100644
--- a/src/Illuminate/Mail/MailManager.php
+++ b/src/Illuminate/Mail/MailManager.php
@@ -281,7 +281,7 @@ protected function createMailgunTransport(array $config)
         }
 
         return $factory->create(new Dsn(
-            'mailgun+https',
+            'mailgun+'.($config['scheme'] ?? 'https'),
             $config['endpoint'] ?? 'default',
             $config['secret'],
             $config['domain']