diff --git a/feed-to-muc.go b/feed-to-muc.go
index 92413ac..508740e 100644
--- a/feed-to-muc.go
+++ b/feed-to-muc.go
@@ -204,8 +204,9 @@ func pingMUC(client *xmpp.Client, botJid string, Muc string, MucNick string) {
 						}
 					} else {
 						// Send error replies for all other IQs.
-						_, err := client.RawInformation(client.JID(), v.From, v.ID, "error",
-							string(v.Query)+"<error/>")
+						_, err := client.RawInformation(client.JID(), v.From, v.ID, "error", string(v.Query)+
+							"<error type='cancel'><feature-not-implemented "+
+							"xmlns='urn:ietf:params:xml:ns:xmpp-stanzas'/><error/>")
 						if err != nil {
 							log.Fatal(err)
 						}