diff --git a/CHANGES b/CHANGES
index b12cfd398c6..5c35cff7b77 100644
--- a/CHANGES
+++ b/CHANGES
@@ -22,6 +22,8 @@ Bugs fixed
 * #7418: std domain: duplication warning for glossary terms is case insensitive
 * #7438: C++, fix merging overloaded functions in parallel builds.
 * #7422: autodoc: fails with ValueError when using autodoc_mock_imports
+* #7451: autodoc: fails with AttributeError when an object returns non-string
+  object as a ``__doc__`` member
 
 Testing
 --------
diff --git a/sphinx/ext/autodoc/__init__.py b/sphinx/ext/autodoc/__init__.py
index ad3e5f00add..f3835f4db54 100644
--- a/sphinx/ext/autodoc/__init__.py
+++ b/sphinx/ext/autodoc/__init__.py
@@ -557,6 +557,9 @@ def is_filtered_inherited_member(name: str) -> bool:
                 isattr = False
 
             doc = getdoc(member, self.get_attr, self.env.config.autodoc_inherit_docstrings)
+            if not isinstance(doc, str):
+                # Ignore non-string __doc__
+                doc = None
 
             # if the member __doc__ is the same as self's __doc__, it's just
             # inherited and therefore not the member's doc