diff --git a/src/common/connection_handlers.py b/src/common/connection_handlers.py
index ad866ee35..0a155cec1 100644
--- a/src/common/connection_handlers.py
+++ b/src/common/connection_handlers.py
@@ -760,7 +760,7 @@ class ConnectionDisco:
 				q.addChild('feature', attrs = {'var': common.xmpp.NS_MUC_USER})
 				q.addChild('feature', attrs = {'var': common.xmpp.NS_MUC_ADMIN})
 				q.addChild('feature', attrs = {'var': common.xmpp.NS_MUC_OWNER})
-				q.addChild('feature', attrs = {'var': common.xmpp.NS_MUC + '#roomconfig'})
+				q.addChild('feature', attrs = {'var': common.xmpp.NS_MUC_CONFIG})
 				q.addChild('feature', attrs = {'var': common.xmpp.NS_COMMANDS})
 				q.addChild('feature', attrs = {'var': common.xmpp.NS_DISCO_INFO})
 				q.addChild('feature', attrs = {'var': 'ipv6'})
diff --git a/src/common/xmpp/protocol.py b/src/common/xmpp/protocol.py
index 061712e73..a9140c8f9 100644
--- a/src/common/xmpp/protocol.py
+++ b/src/common/xmpp/protocol.py
@@ -68,6 +68,7 @@ NS_MUC_USER     =NS_MUC+'#user'
 NS_MUC_ADMIN    =NS_MUC+'#admin'
 NS_MUC_OWNER    =NS_MUC+'#owner'
 NS_MUC_UNIQUE   =NS_MUC+'#unique'
+NS_MUC_CONFIG   =NS_MUC+'#roomconfig'
 NS_NICK         ='http://jabber.org/protocol/nick'                      # XEP-0172
 NS_OFFLINE      ='http://www.jabber.org/jeps/jep-0030.html'             # XEP-0013
 NS_PHYSLOC      ='http://jabber.org/protocol/physloc'                   # XEP-0112