diff --git a/src/Symfony/Component/HttpFoundation/File/MimeType/MimeTypeExtensionGuesser.php b/src/Symfony/Component/HttpFoundation/File/MimeType/MimeTypeExtensionGuesser.php
index 49c323c1f5..36271afe4a 100644
--- a/src/Symfony/Component/HttpFoundation/File/MimeType/MimeTypeExtensionGuesser.php
+++ b/src/Symfony/Component/HttpFoundation/File/MimeType/MimeTypeExtensionGuesser.php
@@ -599,6 +599,7 @@ class MimeTypeExtensionGuesser implements ExtensionGuesserInterface
         'application/x-xliff+xml' => 'xlf',
         'application/x-xpinstall' => 'xpi',
         'application/x-xz' => 'xz',
+        'application/x-zip-compressed' => 'zip',
         'application/x-zmachine' => 'z1',
         'application/xaml+xml' => 'xaml',
         'application/xcap-diff+xml' => 'xdf',