diff --git a/parso/python/tree.py b/parso/python/tree.py
index e342407..1437661 100644
--- a/parso/python/tree.py
+++ b/parso/python/tree.py
@@ -57,7 +57,11 @@ from parso.utils import split_lines
 _FLOW_CONTAINERS = set(['if_stmt', 'while_stmt', 'for_stmt', 'try_stmt',
                         'with_stmt', 'async_stmt', 'suite'])
 _RETURN_STMT_CONTAINERS = set(['suite', 'simple_stmt']) | _FLOW_CONTAINERS
-_FUNC_CONTAINERS = set(['suite', 'simple_stmt', 'decorated']) | _FLOW_CONTAINERS
+
+_FUNC_CONTAINERS = set(
+    ['suite', 'simple_stmt', 'decorated', 'async_funcdef']
+) | _FLOW_CONTAINERS
+
 _GET_DEFINITION_TYPES = set([
     'expr_stmt', 'sync_comp_for', 'with_stmt', 'for_stmt', 'import_name',
     'import_from', 'param', 'del_stmt',
diff --git a/test/test_parser_tree.py b/test/test_parser_tree.py
index 3665f4e..7408479 100644
--- a/test/test_parser_tree.py
+++ b/test/test_parser_tree.py
@@ -222,3 +222,19 @@ def test_is_definition(code, name_index, is_definition, include_setitem):
         name = name.get_next_leaf()
 
     assert name.is_definition(include_setitem=include_setitem) == is_definition
+
+
+def test_iter_funcdefs():
+    code = dedent('''
+        def normal(): ...
+        async def asyn(): ...
+        @dec
+        def dec_normal(): ...
+        @dec1
+        @dec2
+        async def dec_async(): ...
+        def broken
+        ''')
+    module = parse(code, version='3.8')
+    func_names = [f.name.value for f in module.iter_funcdefs()]
+    assert func_names == ['normal', 'asyn', 'dec_normal', 'dec_async']