diff --git a/.drone.yml b/.drone.yml
index daf5886f3a..e49bd0725d 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -29,6 +29,11 @@ pipeline:
             - pip install twine
             - python setup.py sdist
             - twine check dist/*
+    check_doc:
+        image: ${IMAGE]
+        commands:
+            - pip install sphinx
+            - python -m sphinx -T -E -W -n -b html doc _build/html
 
 services:
     postgresql:
diff --git a/doc/design.rst b/doc/design.rst
index 295bd26938..89bf0d54ab 100644
--- a/doc/design.rst
+++ b/doc/design.rst
@@ -40,7 +40,7 @@ in the period.
 Wizards
 -------
 
-.. _wizard-account.invoice.deferred.create_moves
+.. _wizard-account.invoice.deferred.create_moves:
 
 Invoice Deferred Create Moves
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
diff --git a/doc/index.rst b/doc/index.rst
index fb8e9dbc89..2bcb9b278e 100644
--- a/doc/index.rst
+++ b/doc/index.rst
@@ -8,4 +8,5 @@ an invoice line over many periods.
 .. toctree::
    :maxdepth: 2
 
+   usage
    design
diff --git a/doc/usage.rst b/doc/usage.rst
index b88eedc1bd..c8d315530e 100644
--- a/doc/usage.rst
+++ b/doc/usage.rst
@@ -2,7 +2,7 @@
 Usage
 *****
 
-.. _Defer line from invoice
+.. _Defer line from invoice:
 
 Defer line from invoice
 =======================