diff --git a/src/Composer/Util/Url.php b/src/Composer/Util/Url.php
index 040d17db0..32f61347b 100644
--- a/src/Composer/Util/Url.php
+++ b/src/Composer/Util/Url.php
@@ -75,7 +75,7 @@ class Url
             $origin .= ':'.$port;
         }
 
-        if (strpos($origin, '.github.com') === (strlen($origin) - 11)) {
+        if (str_ends_with($origin, '.github.com') && $origin !== 'codeload.github.com') {
             return 'github.com';
         }