diff --git a/Documentation/cgroups/00-INDEX b/Documentation/cgroups/00-INDEX
index bc461b6425a7eddb03898362ef2bee5f55a84a69..96ce071a3633913f6217011d19f0d5fbb20233a6 100644
--- a/Documentation/cgroups/00-INDEX
+++ b/Documentation/cgroups/00-INDEX
@@ -24,3 +24,5 @@ net_prio.txt
 	- Network priority cgroups details and usages.
 resource_counter.txt
 	- Resource Counter API.
+unified-hierarchy.txt
+	- Description the new/next cgroup interface.