diff --git a/lib/spack/docs/index.rst b/lib/spack/docs/index.rst
index 5c93285cbbf..a6b668b13b4 100644
--- a/lib/spack/docs/index.rst
+++ b/lib/spack/docs/index.rst
@@ -73,6 +73,7 @@ or refer to the full manual below.
    command_index
    package_list
    chain
+   shared
    extensions
 
 .. toctree::