diff --git a/GPy/models/state_space_xt_sep.py b/GPy/models/state_space_xt_sep.py
index 5127cb98..d2b6873a 100644
--- a/GPy/models/state_space_xt_sep.py
+++ b/GPy/models/state_space_xt_sep.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2013,  Arno Solin, Mu Niu, Simo Sarkka.
+# Copyright (c) 2013,   Mu Niu,Arno Solin, Simo Sarkka.
 # Licensed under the BSD 3-clause license (see LICENSE.txt) ??
 #
 # This implementation of converting GPs to state space models is based on the article: