diff --git a/ietf/templates/doc/document_draft.html b/ietf/templates/doc/document_draft.html
index 72256b632..b38225dd4 100644
--- a/ietf/templates/doc/document_draft.html
+++ b/ietf/templates/doc/document_draft.html
@@ -13,7 +13,7 @@
           title="Document changes"
           href="/feed/document-changes/{{ name }}/">
     <meta name="description"
-          content="{{ doc.title }} {% if doc.get_state_slug == 'rfc' and not snapshot %}(RFC {{ rfc_number }}{% if published %}, {{ doc.pub_date|date:'F Y' }}{% endif %}{% if obsoleted_by %}; obsoleted by {{ obsoleted_by|join:', ' }}{% endif %}){% else %}(Internet-Draft, {{ doc.time|date:'Y' }}){% endif %}">
+          content="{{ doc.title }} {% if doc.get_state_slug == 'rfc' and not snapshot %}(RFC {{ rfc_number }}{% if published %}, {{ doc.pub_date|date:'F Y' }}{% endif %}{% if obsoleted_by %}; obsoleted by {% for rel in obsoleted_by %}{{ rel.source.canonical_name|prettystdname}}{% if not forloop.last%}, {% endif %}{% endfor %}{% endif %}){% endif %}">
 {% endblock %}
 {% block morecss %}.inline { display: inline; }{% endblock %}
 {% block title %}
diff --git a/ietf/templates/doc/document_html.html b/ietf/templates/doc/document_html.html
index 9823a0d37..7ee8f8124 100644
--- a/ietf/templates/doc/document_html.html
+++ b/ietf/templates/doc/document_html.html
@@ -34,7 +34,7 @@
               href="/feed/document-changes/{{ doc.name }}/">
         <meta name="description"
             {% if not snapshot and doc.get_state_slug == 'rfc' %}
-                content="{{ doc.title }} (RFC {{ doc.rfc_number }}{% if published %}, {{ published.time|date:'F Y' }}{% endif %}{% if obsoleted_by %}; obsoleted by {{ obsoleted_by|join:', ' }}{% endif %}"
+                content="{{ doc.title }} (RFC {{ doc.rfc_number }}{% if published %}, {{ published.time|date:'F Y' }}{% endif %}{% if obsoleted_by %}; obsoleted by {% for rel in obsoleted_by %}{{ rel.source.canonical_name|prettystdname}}{% if not forloop.last%}, {% endif %}{% endfor %}{% endif %})"
             {% else %}
                 content="{{ doc.title }} (Internet-Draft, {{ doc.time|date:'Y' }})"
             {% endif %}>