diff --git a/src/util/sstream.h b/src/util/sstream.h
index 23d5bdfbb..fba13c5d5 100644
--- a/src/util/sstream.h
+++ b/src/util/sstream.h
@@ -1,10 +1,20 @@
-
-
 /*
-Copyright (c) 2013 Microsoft Corporation. All rights reserved.
-Released under Apache 2.0 license as described in the file LICENSE.
+Copyright (c) 2018 Microsoft Corporation
+
+Module Name:
+
+    nat_set.h
+
+Abstract:
+
+    Wrapper for sstream.
+
+Author:
+
+    Leonardo de Moura (leonardo) 2013
+
+Revision History:
 
-Author: Leonardo de Moura
 */
 #pragma once
 #include <sstream>