diff --git a/doc/reference/index.rst b/doc/reference/index.rst
index d21275103dd..d132c578064 100644
--- a/doc/reference/index.rst
+++ b/doc/reference/index.rst
@@ -4,7 +4,8 @@ API Reference
 #############
 
 .. toctree::
-   :maxdepth: 1
+   :titlesonly:
+   :maxdepth: 2
 
    api/index.rst
    audio/index.rst