diff --git a/StdLibPrivateInternalFiles/DoNotUse.dec b/StdLibPrivateInternalFiles/DoNotUse.dec
index da6061b720..35c737c7ad 100644
--- a/StdLibPrivateInternalFiles/DoNotUse.dec
+++ b/StdLibPrivateInternalFiles/DoNotUse.dec
@@ -1,6 +1,6 @@
 ## @file
 #
-# Copyright (c) 2010 - 2011, Intel Corporation. All rights reserved.<BR>
+# Copyright (c) 2010 - 2018, Intel Corporation. All rights reserved.<BR>
 #
 # This program and the accompanying materials are licensed and made available under
 # the terms and conditions of the BSD License which accompanies this distribution.
@@ -28,9 +28,6 @@
 [Includes.X64]
   Include/X64
 
-[Includes.IPF]
-  Include/Ipf
-
 [Includes.ARM]
   Include/Arm
 
diff --git a/StdLibPrivateInternalFiles/Include/Ipf/arith.h b/StdLibPrivateInternalFiles/Include/Ipf/arith.h
deleted file mode 100644
index 2c07ea28e2..0000000000
--- a/StdLibPrivateInternalFiles/Include/Ipf/arith.h
+++ /dev/null
@@ -1,6 +0,0 @@
-/*	$NetBSD: arith.h,v 1.1 2006/09/10 21:22:33 cherry Exp $	*/
-
-#define IEEE_LITTLE_ENDIAN
-#ifndef _IEEE_FP
-#define Sudden_Underflow
-#endif
diff --git a/StdLibPrivateInternalFiles/Include/Ipf/gd_qnan.h b/StdLibPrivateInternalFiles/Include/Ipf/gd_qnan.h
deleted file mode 100644
index c46820499a..0000000000
--- a/StdLibPrivateInternalFiles/Include/Ipf/gd_qnan.h
+++ /dev/null
@@ -1,5 +0,0 @@
-/* $NetBSD: gd_qnan.h,v 1.1 2006/09/10 21:22:33 cherry Exp $ */
-
-#define f_QNAN 0x7fc00000
-#define d_QNAN0 0x0
-#define d_QNAN1 0x7ff80000