diff --git a/incorporealcms/feed.py b/incorporealcms/feed.py
index 923b8f1..63e0d00 100644
--- a/incorporealcms/feed.py
+++ b/incorporealcms/feed.py
@@ -32,7 +32,7 @@ def serve_feed(feed_type):
         abort(404)
 
     fg = FeedGenerator()
-    fg.id(f'{app.config["DOMAIN_NAME"]}')
+    fg.id(f'https://{app.config["DOMAIN_NAME"]}/')
     fg.title(f'{app.config["TITLE_SUFFIX"]}')
     fg.link(href=f'https://{app.config["DOMAIN_NAME"]}/feed/{feed_type}', rel='self')
     fg.link(href=f'https://{app.config["DOMAIN_NAME"]}', rel='alternate')
diff --git a/tests/test_feed.py b/tests/test_feed.py
index c98db6e..84d2907 100644
--- a/tests/test_feed.py
+++ b/tests/test_feed.py
@@ -29,4 +29,5 @@ def test_rss_type_is_200(client):
 def test_feed_generator(app):
     """Test the root feed generator."""
     with app.test_request_context():
-        serve_feed('atom')
+        content = serve_feed('atom')
+    assert b'<id>https://example.com/</id>' in content