diff --git a/src/common/xmpp/protocol.py b/src/common/xmpp/protocol.py
index 188a83895..527ac868a 100644
--- a/src/common/xmpp/protocol.py
+++ b/src/common/xmpp/protocol.py
@@ -111,7 +111,7 @@ NS_XHTML        = 'http://www.w3.org/1999/xhtml'                        #  "
 NS_DATA_LAYOUT  ='http://jabber.org/protocol/xdata-layout'              # XEP-0141
 NS_DATA_VALIDATE='http://jabber.org/protocol/xdata-validate'            # XEP-0122
 NS_XMPP_STREAMS ='urn:ietf:params:xml:ns:xmpp-streams'
-NS_RECEIPTS	='urn:xmpp:receipt'
+NS_RECEIPTS	='urn:xmpp:receipts'
 
 xmpp_stream_error_conditions="""
 bad-format --  --  -- The entity has sent XML that cannot be processed.