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-rw-r--r--lib/rssaction.php2
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/rssaction.php b/lib/rssaction.php
index ffa1f9e99..7686d0646 100644
--- a/lib/rssaction.php
+++ b/lib/rssaction.php
@@ -320,6 +320,8 @@ class Rss10Action extends Action
'http://rdfs.org/sioc/ns#',
'xmlns:sioct' =>
'http://rdfs.org/sioc/types#',
+ 'xmlns:rdfs' =>
+ 'http://www.w3.org/2000/01/rdf-schema#',
'xmlns:laconica' =>
'http://laconi.ca/ont/',
'xmlns' => 'http://purl.org/rss/1.0/'));