diff --git a/src/Composer/Util/RemoteFilesystem.php b/src/Composer/Util/RemoteFilesystem.php
index f482c91b9..5b137686d 100644
--- a/src/Composer/Util/RemoteFilesystem.php
+++ b/src/Composer/Util/RemoteFilesystem.php
@@ -1008,7 +1008,7 @@ class RemoteFilesystem
         // Path for a public download follows this pattern /{user}/{repo}/downloads/{whatever}
         // {@link https://blog.bitbucket.org/2009/04/12/new-feature-downloads/}
         $pathParts = explode('/', $path);
-        if (count($pathParts) >= 4 && $pathParts[2] != 'downloads') {
+        if (count($pathParts) >= 4 && $pathParts[3] == 'downloads') {
             return true;
         }