diff --git a/doc/manual/index.rst b/doc/manual/index.rst
index c7ecde30f..76b0b8f61 100644
--- a/doc/manual/index.rst
+++ b/doc/manual/index.rst
@@ -1,9 +1,8 @@
 ARTIQ documentation
 ===================
 
-Contents:
-
 .. toctree::
+    :caption: Contents
     :maxdepth: 2
 
     introduction