diff --git a/windows/security/book/features-index.md b/windows/security/book/features-index.md
index 3d424069bb..f0743ac2be 100644
--- a/windows/security/book/features-index.md
+++ b/windows/security/book/features-index.md
@@ -5,7 +5,7 @@ ms.topic: overview
 ms.date: 06/17/2024
 ---
 
-# Subject index
+# Features index
 
 - [Assigned Access](operating-system-security-system-security.md#assigned-access)
 - [Certificates](operating-system-security-system-security.md#certificates)