diff --git a/doc/manual/conf.py b/doc/manual/conf.py
index beeef0166..dab2d6d6e 100644
--- a/doc/manual/conf.py
+++ b/doc/manual/conf.py
@@ -43,7 +43,7 @@ for module in mock_modules:
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the
 # documentation root, use os.path.abspath to make it absolute, like shown here.
-sys.path.insert(0, os.path.abspath('..'))
+sys.path.insert(0, os.path.abspath('../..'))
 
 from artiq import __version__ as artiq_version