diff --git a/windows/security/TOC.yml b/windows/security/TOC.yml
index d92cd2c7d5..cef0b7006c 100644
--- a/windows/security/TOC.yml
+++ b/windows/security/TOC.yml
@@ -34,6 +34,7 @@
 - name: Operating system security
   items: 
    - name: System security
+     href: operating-system.md
      items:
      - name: Secure the Windows 10 boot process
        href: information-protection/secure-the-windows-10-boot-process.md