1 files changed, 2 insertions, 3 deletions
diff --git a/sphinx/domains/std.py b/sphinx/domains/std.py
index 0fa93dd23..4b3441cfe 100644
--- a/sphinx/domains/std.py
+++ b/sphinx/domains/std.py
@@ -13,7 +13,7 @@ import unicodedata
 import warnings
 from copy import copy
 from typing import Any, Callable, Dict, Iterable, Iterator, List, Optional, Tuple, Type, Union
-from typing import cast
+from typing import TYPE_CHECKING, cast
 
 from docutils import nodes
 from docutils.nodes import Element, Node, system_message
@@ -32,8 +32,7 @@ from sphinx.util.docutils import SphinxDirective
 from sphinx.util.nodes import clean_astext, make_id, make_refnode
 from sphinx.util.typing import RoleFunction
 
-if False:
-    # For type annotation
+if TYPE_CHECKING:
     from sphinx.application import Sphinx
     from sphinx.builders import Builder
     from sphinx.environment import BuildEnvironment