diff --git a/windows/security/TOC.yml b/windows/security/TOC.yml
index cef0b7006c..d13521f976 100644
--- a/windows/security/TOC.yml
+++ b/windows/security/TOC.yml
@@ -32,9 +32,9 @@
     - name: Kernel DMA Protection
       href: information-protection/kernel-dma-protection-for-thunderbolt.md
 - name: Operating system security
+  href: operating-system.md
   items: 
-   - name: System security
-     href: operating-system.md
+   - name: System security   
      items:
      - name: Secure the Windows 10 boot process
        href: information-protection/secure-the-windows-10-boot-process.md