diff --git a/doc/conf.py b/doc/conf.py
index 0386f7676e0be..c4d7e578216fd 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -51,6 +51,7 @@
 if os.environ.get('NO_MATHJAX'):
     extensions.append('sphinx.ext.imgmath')
     imgmath_image_format = 'svg'
+    mathjax_path = ''
 else:
     extensions.append('sphinx.ext.mathjax')
     mathjax_path = ('https://cdn.jsdelivr.net/npm/mathjax@3/es5/'