diff --git a/libcxx/docs/index.rst b/libcxx/docs/index.rst
index c62dfe833923..8f21a27fe763 100644
--- a/libcxx/docs/index.rst
+++ b/libcxx/docs/index.rst
@@ -135,7 +135,6 @@ Design Documents
 
 * `<atomic> design <http://libcxx.llvm.org/atomic_design.html>`_
 * `<type_traits> design <http://libcxx.llvm.org/type_traits_design.html>`_
-* `Status of debug mode <http://libcxx.llvm.org/debug_mode.html>`_
 * `Notes by Marshall Clow`__
 
 .. __: https://cplusplusmusings.wordpress.com/2012/07/05/clang-and-standard-libraries-on-mac-os-x/