diff --git a/Documentation/repository-layout.txt b/Documentation/repository-layout.txt
index 275d18b..03a6f77 100644
--- a/Documentation/repository-layout.txt
+++ b/Documentation/repository-layout.txt
@@ -141,3 +141,9 @@ logs/refs/heads/`name`::
 
 logs/refs/tags/`name`::
 	Records all changes made to the tag named `name`.
+
+shallow::
+	Records the sha1 of the commits which is marked to have no
+	parents to represent a shallow repository.The commit object
+	will have the parent information present. It carry one
+	record per line.