diff --git a/docs/source/conf.py b/docs/source/conf.py
index d9c4ae6d315..90554e7f4b7 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -50,7 +50,7 @@
 # use autodocs
 extensions.append('sphinx.ext.autodoc')
 extensions.append('util.cellref')
-cells_loc = Path(__file__).parent / 'generated'
+cells_json = Path(__file__).parent / 'generated' / 'cells.json'
 
 from sphinx.application import Sphinx
 def setup(app: Sphinx) -> None: