diff --git a/CHANGES b/CHANGES
index dd32ab91e..c93471da7 100644
--- a/CHANGES
+++ b/CHANGES
@@ -78,6 +78,7 @@ Bugs fixed
 * #8437: Makefile: ``make clean`` with empty BUILDDIR is dangerous
 * #8352: std domain: Failed to parse an option that starts with bracket
 * #8519: LaTeX: Prevent page brake in the middle of a seealso
+* #8522: fix ``__bool__`` method could be called by autodoc module.
 
 Testing
 --------
diff --git a/sphinx/ext/autodoc/__init__.py b/sphinx/ext/autodoc/__init__.py
index ea2818800..b663e4d04 100644
--- a/sphinx/ext/autodoc/__init__.py
+++ b/sphinx/ext/autodoc/__init__.py
@@ -716,7 +716,7 @@ class Documenter:
                 isprivate = membername.startswith('_')
 
             keep = False
-            if safe_getattr(member, '__sphinx_mock__', False):
+            if safe_getattr(member, '__sphinx_mock__', None) is not None:
                 # mocked module or object
                 pass
             elif self.options.exclude_members and membername in self.options.exclude_members: