diff --git a/tests/test_web.py b/tests/test_web.py
index 8311f9e..76bbed5 100644
--- a/tests/test_web.py
+++ b/tests/test_web.py
@@ -1803,10 +1803,12 @@ class WebTest(TestCase):
                                      'verb': 'post',
                                      'id': 'https://user.com/post',
                                      'url': 'https://user.com/post',
+                                     'actor': {'id': 'https://user.com/'},
                                      'object':{
                                          'objectType': 'note',
                                          'id': 'https://user.com/post',
                                          'url': 'https://user.com/post',
+                                         'author': {'id': 'https://user.com/'},
                                          'content': 'I hereby ☕ post',
                                      },
                                      'feed_index': 0,
@@ -1879,10 +1881,12 @@ class WebTest(TestCase):
                     'verb': 'post',
                     'id': url,
                     'url': url,
+                    'actor': {'id': 'https://user.com/'},
                     'object':{
                         'objectType': 'note',
                         'id': url,
                         'url': url,
+                        'author': {'id': 'https://user.com/'},
                         'content': f'I hereby ☕ post {id}',
                         'published': f'2012-12-0{day}T00:00:00+00:00',
                     },
diff --git a/web.py b/web.py
index eba8f02..0617b07 100644
--- a/web.py
+++ b/web.py
@@ -659,6 +659,12 @@ def poll_feed_task():
     published_last = None
     published_deltas = []  # timedeltas between entry published times
     for i, activity in enumerate(activities):
+        # default actor and author to user
+        activity.setdefault('actor', {}).setdefault('id', user.profile_id())
+        activity.setdefault('object', {})\
+                .setdefault('author', {})\
+                .setdefault('id', user.profile_id())
+
         logger.info(f'Converted to AS1: {json_dumps(activity, indent=2)}')
 
         published = activity.get('object', {}).get('published')