3 files changed, 6 insertions, 6 deletions
diff --git a/sphinx/transforms/__init__.py b/sphinx/transforms/__init__.py
index a00f04fdf..2185b3de1 100644
--- a/sphinx/transforms/__init__.py
+++ b/sphinx/transforms/__init__.py
@@ -10,6 +10,7 @@
 
 import re
 from typing import Any, Dict, Generator, List, Tuple
+from typing import TYPE_CHECKING
 
 from docutils import nodes
 from docutils.nodes import Element, Node, Text
@@ -28,8 +29,7 @@ from sphinx.util.docutils import new_document
 from sphinx.util.i18n import format_date
 from sphinx.util.nodes import NodeMatcher, apply_source_workaround, is_smartquotable
 
-if False:
-    # For type annotation
+if TYPE_CHECKING:
     from sphinx.application import Sphinx
     from sphinx.domain.std import StandardDomain
     from sphinx.environment import BuildEnvironment
diff --git a/sphinx/transforms/i18n.py b/sphinx/transforms/i18n.py
index c889884af..e6a12b962 100644
--- a/sphinx/transforms/i18n.py
+++ b/sphinx/transforms/i18n.py
@@ -11,6 +11,7 @@
 from os import path
 from textwrap import indent
 from typing import Any, Dict, List, Tuple, Type, TypeVar
+from typing import TYPE_CHECKING
 
 from docutils import nodes
 from docutils.io import StringInput
@@ -29,8 +30,7 @@ from sphinx.util.nodes import (
     extract_messages, is_pending_meta, traverse_translatable_index,
 )
 
-if False:
-    # For type annotation
+if TYPE_CHECKING:
     from sphinx.application import Sphinx
 
 
diff --git a/sphinx/transforms/references.py b/sphinx/transforms/references.py
index e74d9657d..d25c8cbac 100644
--- a/sphinx/transforms/references.py
+++ b/sphinx/transforms/references.py
@@ -9,14 +9,14 @@
 """
 
 from typing import Any, Dict
+from typing import TYPE_CHECKING
 
 from docutils import nodes
 from docutils.transforms.references import DanglingReferences, Substitutions
 
 from sphinx.transforms import SphinxTransform
 
-if False:
-    # For type annotation
+if TYPE_CHECKING:
     from sphinx.application import Sphinx