1 files changed, 6 insertions, 0 deletions
diff --git a/sphinx/apidoc.py b/sphinx/apidoc.py
index be5e5c5ab..f6616e497 100644
--- a/sphinx/apidoc.py
+++ b/sphinx/apidoc.py
@@ -10,12 +10,18 @@
 """
 
 import warnings
+from typing import TYPE_CHECKING
 
 from sphinx.deprecation import RemovedInSphinx20Warning
 from sphinx.ext.apidoc import main as _main
 
+if TYPE_CHECKING:
+    from typing import Any  # NOQA
+    from sphinx.application import Sphinx  # NOQA
+
 
 def main(*args, **kwargs):
+    # type: (Any, Any) -> None
     warnings.warn(
         '`sphinx.apidoc.main()` has moved to `sphinx.ext.apidoc.main()`.',
         RemovedInSphinx20Warning,