diff --git a/ShellPkg/Library/UefiShellLevel2CommandsLib/UefiShellLevel2CommandsLib.c b/ShellPkg/Library/UefiShellLevel2CommandsLib/UefiShellLevel2CommandsLib.c
index 7948e53cfc46..4dbff4de26f8 100644
--- a/ShellPkg/Library/UefiShellLevel2CommandsLib/UefiShellLevel2CommandsLib.c
+++ b/ShellPkg/Library/UefiShellLevel2CommandsLib/UefiShellLevel2CommandsLib.c
@@ -21,6 +21,7 @@
* functions are non-interactive only
+ (C) Copyright 2017 Hewlett Packard Enterprise Development LP
Copyright (c) 2014 Hewlett-Packard Development Company, L.P.
Copyright (c) 2009 - 2015, Intel Corporation. All rights reserved.
This program and the accompanying materials
@@ -268,6 +269,7 @@ VerifyIntermediateDirectories (
@return Char as an upper case character.
**/
CHAR16
+EFIAPI
InternalCharToUpper (
IN CONST CHAR16 Char
);