diff --git a/docs/index.rst b/docs/index.rst
index 8b64117..f23e50a 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -1,15 +1,17 @@
+.. _swh-loader-mercurial:
+
 Software Heritage - Development Documentation
 =============================================
 
 .. toctree::
    :maxdepth: 2
    :caption: Contents:
 
 
 
 Indices and tables
 ==================
 
 * :ref:`genindex`
 * :ref:`modindex`
 * :ref:`search`