diff --git a/.themes/classic/source/_includes/feed_entry.xml b/.themes/classic/source/_includes/feed_entry.xml
index 38d8c5c..b34c33b 100644
--- a/.themes/classic/source/_includes/feed_entry.xml
+++ b/.themes/classic/source/_includes/feed_entry.xml
@@ -7,3 +7,4 @@
 <link href="{{ title_url }}"/>
 <updated>{{ post.date | date_to_xmlschema }}</updated>
 <id>{{ site.url }}{{ post.id }}</id>
+{% for category in post.categories %}<category term="{{ category }}" />{% endfor %}