1 files changed, 2 insertions, 2 deletions
diff --git a/sphinx/util/fileutil.py b/sphinx/util/fileutil.py
index 7caf40275..9b9725810 100644
--- a/sphinx/util/fileutil.py
+++ b/sphinx/util/fileutil.py
@@ -13,13 +13,13 @@ from __future__ import absolute_import
 import codecs
 import os
 import posixpath
+from typing import TYPE_CHECKING
 
 from docutils.utils import relative_path
 
 from sphinx.util.osutil import copyfile, ensuredir, walk
 
-if False:
-    # For type annotation
+if TYPE_CHECKING:
     from typing import Callable, Dict, Union  # NOQA
     from sphinx.util.matching import Matcher  # NOQA
     from sphinx.util.template import BaseRenderer  # NOQA