diff --git a/src/mod_offline.erl b/src/mod_offline.erl
index 2edd015f5..6849e7acc 100644
--- a/src/mod_offline.erl
+++ b/src/mod_offline.erl
@@ -586,7 +586,7 @@ discard_warn_sender(Msgs) ->
     lists:foreach(
       fun(#offline_msg{from=From, to=To, packet=Packet}) ->
 	      ErrText = "Your contact offline message queue is full. The message has been discarded.",
-	      Error = exmpp_stanza:error('resource-constraint',
+	      Error = exmpp_stanza:error(Packet#xmlel.ns, 'resource-constraint',
 		{"en", ErrText}),
 	      Err = exmpp_stanza:reply_with_error(Packet, Error),
 	      ejabberd_router:route(
diff --git a/src/mod_offline_odbc.erl b/src/mod_offline_odbc.erl
index 0004c9d0d..55374901e 100644
--- a/src/mod_offline_odbc.erl
+++ b/src/mod_offline_odbc.erl
@@ -353,7 +353,7 @@ discard_warn_sender(Msgs) ->
     lists:foreach(
       fun(#offline_msg{from=From, to=To, packet=Packet}) ->
 	      ErrText = "Your contact offline message queue is full. The message has been discarded.",
-	      Error = exmpp_stanza:error('resource-constraint',
+	      Error = exmpp_stanza:error(Packet#xmlel.ns, 'resource-constraint',
 		{"en", ErrText}),
 	      Err = exmpp_stanza:reply_with_error(Packet, Error),
 	      ejabberd_router:route(