diff --git a/sphinx/ext/autosummary/generate.py b/sphinx/ext/autosummary/generate.py
index 34e56eedb..603ad9eb7 100644
--- a/sphinx/ext/autosummary/generate.py
+++ b/sphinx/ext/autosummary/generate.py
@@ -193,8 +193,10 @@ class ModuleScanner:
                            name, exc, type='autosummary')
             return False
 
-    def scan(self, imported_members: bool, attr_docs: Mapping[str,str] = {}) -> List[str]:
+    def scan(self, imported_members: bool) -> List[str]:
         members = []
+        analyzer = ModuleAnalyzer.for_module(self.object.__name__)
+        attr_docs = analyzer.find_attr_docs()
         for name in members_of(self.object, self.app.config):
             try:
                 value = safe_getattr(self.object, name)
@@ -306,6 +308,8 @@ def generate_autosummary_content(name: str, obj: Any, parent: Any,
         """Find module attributes with docstrings."""
         attrs, public = [], []
         try:
+            analyzer = ModuleAnalyzer.for_module(name)
+            attr_docs = analyzer.find_attr_docs()
             for namespace, attr_name in attr_docs:
                 if namespace == '' and attr_name in members:
                     attrs.append(attr_name)
@@ -334,10 +338,8 @@ def generate_autosummary_content(name: str, obj: Any, parent: Any,
     ns.update(context)
 
     if doc.objtype == 'module':
-        analyzer = ModuleAnalyzer.for_module(name)
-        attr_docs = analyzer.find_attr_docs()
         scanner = ModuleScanner(app, obj)
-        ns['members'] = scanner.scan(imported_members, attr_docs)
+        ns['members'] = scanner.scan(imported_members)
         ns['functions'], ns['all_functions'] = \
             get_members(obj, {'function'}, imported=imported_members)
         ns['classes'], ns['all_classes'] = \