diff --git a/layouts/_default/rss.xml b/layouts/_default/rss.xml
index b6a7ec06..eb888afb 100644
--- a/layouts/_default/rss.xml
+++ b/layouts/_default/rss.xml
@@ -43,7 +43,7 @@
 {{- $pages = $pages | first $limit }}
 {{- end }}
 {{- printf "<?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"yes\"?>" | safeHTML }}
-<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom">
+<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom" xmlns:content="http://purl.org/rss/1.0/modules/content/">
   <channel>
     <title>{{ if eq .Title site.Title }}{{ site.Title }}{{ else }}{{ with .Title }}{{ . }} on {{ end }}{{ site.Title }}{{ end }}</title>
     <link>{{ .Permalink }}</link>