refactor: Add Optional to type annotations

1 files changed, 2 insertions, 2 deletions

diff --git a/sphinx/domains/rst.py b/sphinx/domains/rst.py
index d048c2dfb..539a610bb 100644
--- a/sphinx/domains/rst.py
+++ b/sphinx/domains/rst.py
@@ -9,7 +9,7 @@
 """
 
 import re
-from typing import Any, Dict, Iterator, List, Tuple, cast
+from typing import Any, Dict, Iterator, List, Optional, Tuple, cast
 
 from docutils.nodes import Element
 from docutils.parsers.rst import directives
@@ -247,7 +247,7 @@ class ReSTDomain(Domain):
 
     def resolve_xref(self, env: BuildEnvironment, fromdocname: str, builder: Builder,
                      typ: str, target: str, node: pending_xref, contnode: Element
-                     ) -> Element:
+                     ) -> Optional[Element]:
         objtypes = self.objtypes_for_role(typ)
         for objtype in objtypes:
             todocname, node_id = self.objects.get((objtype, target), (None, None))