diff --git a/profanity.doap b/profanity.doap
index 00f23012..8ee17758 100644
--- a/profanity.doap
+++ b/profanity.doap
@@ -1,5 +1,6 @@
 <?xml version='1.0' encoding='UTF-8'?>
 <rdf:RDF xmlns:rdf='http://www.w3.org/1999/02/22-rdf-syntax-ns#'
+         xmlns:foaf="http://xmlns.com/foaf/0.1/"
          xmlns='http://usefulinc.com/ns/doap#'
          xmlns:xmpp='https://linkmauve.fr/ns/xmpp-doap#'
          xmlns:schema='https://schema.org/'>