diff --git a/windows/security/book/toc.yml b/windows/security/book/toc.yml
index 5e8eb89d50..2f049334fc 100644
--- a/windows/security/book/toc.yml
+++ b/windows/security/book/toc.yml
@@ -64,4 +64,4 @@ items:
 - name: Conclusion
   href: conclusion.md
 - name: Features index
-  href: subject-index.md
\ No newline at end of file
+  href: feature-index.md
\ No newline at end of file