diff --git a/src/Composer/Repository/ArtifactRepository.php b/src/Composer/Repository/ArtifactRepository.php
index 34ed64ea3..09efc0b9f 100644
--- a/src/Composer/Repository/ArtifactRepository.php
+++ b/src/Composer/Repository/ArtifactRepository.php
@@ -97,6 +97,7 @@ class ArtifactRepository extends ArrayRepository
 
                 if(strpos($directoryName, '\\') !== false ||
                    strpos($directoryName, '/') !== false) {
+                    //composer.json files below first directory are rejected
                     continue;
                 }