diff --git a/blag/blag.py b/blag/blag.py
index 5286b0d..16da0d6 100644
--- a/blag/blag.py
+++ b/blag/blag.py
@@ -207,7 +207,7 @@ def generate_feed(
     feed = feedgenerator.Atom1Feed(
             link=base_url,
             title=blog_title,
-            subtitle=blog_subtitle,
+            description=blog_subtitle,
             feed_url=base_url + 'atom.xml',
     )