diff --git a/pal/src/safecrt/output.inl b/pal/src/safecrt/output.inl
index c63f36df545..252a25e8f73 100644
--- a/pal/src/safecrt/output.inl
+++ b/pal/src/safecrt/output.inl
@@ -1,6 +1,10 @@
-//
-// Copyright (c) Microsoft. All rights reserved.
-// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+//-------------------------------------------------------------------------------------------------------
+// ChakraCore/Pal
+// Contains portions (c) copyright Microsoft, portions copyright (c) the .NET Foundation and Contributors
+// and edits (c) copyright the ChakraCore Contributors.
+// See THIRD-PARTY-NOTICES.txt in the project root for .NET Foundation license
+// Licensed under the MIT license. See LICENSE.txt file in the project root for full license information.
+//-------------------------------------------------------------------------------------------------------
 //
 
 /***
@@ -51,7 +55,7 @@ Buffer size required to be passed to _gcvt, fcvt and other fp conversion routine
 //#include <stddef.h>
 //#include <crtdefs.h>
 //#include <stdio.h>
-//#include <stdarg.h>
+#include <stdarg.h>
 //#include <cvt.h>
 //#include <conio.h>
 //#include <internal.h>