diff --git a/sphinx_mdinclude/sphinx.py b/sphinx_mdinclude/sphinx.py
index 24170ca..84d9a79 100644
--- a/sphinx_mdinclude/sphinx.py
+++ b/sphinx_mdinclude/sphinx.py
@@ -10,7 +10,7 @@
 from docutils.parsers.rst import directives as rst_directives
 
 try:  # new
-    from docutils.io import error_string as ErrorString
+    from docutils.io import error_string as ErrorString  # type: ignore # typeshed #8716
 
     SafeString = str
 except ImportError:  # old