diff --git a/MdePkg/Library/BasePeCoffLib/BasePeCoffLib.inf b/MdePkg/Library/BasePeCoffLib/BasePeCoffLib.inf
index 534b78ec25..56f951a171 100644
--- a/MdePkg/Library/BasePeCoffLib/BasePeCoffLib.inf
+++ b/MdePkg/Library/BasePeCoffLib/BasePeCoffLib.inf
@@ -1,7 +1,10 @@
 #/** @file
 #  PE/COFF Loader Library implementation.
+#  The IPF version library supports loading IPF and EBC PE/COFF image.
+#  The IA32 version library support loading IA32, X64 and EBC PE/COFF images.
+#  The X64 version library support loading IA32, X64 and EBC PE/COFF images.
 #
-#  Copyright (c) 2006 - 2008, Intel Corporation.
+#  Copyright (c) 2006 - 2009, Intel Corporation.
 #
 #  All rights reserved. This program and the accompanying materials
 #  are licensed and made available under the terms and conditions of the BSD License
diff --git a/MdePkg/Library/BasePeCoffLib/Ipf/PeCoffLoaderEx.c b/MdePkg/Library/BasePeCoffLib/Ipf/PeCoffLoaderEx.c
index d35d40be61..95c2da15dd 100644
--- a/MdePkg/Library/BasePeCoffLib/Ipf/PeCoffLoaderEx.c
+++ b/MdePkg/Library/BasePeCoffLib/Ipf/PeCoffLoaderEx.c
@@ -218,12 +218,9 @@ PeCoffLoaderRelocateImageEx (
   Returns TRUE if the machine type of PE/COFF image is supported. Supported
   does not mean the image can be executed it means the PE/COFF loader supports
   loading and relocating of the image type. It's up to the caller to support
-  the entry point.
-
-  This function implies the basic PE/COFF loader/relocator supports IA32, EBC,
-  & x64 images. Calling the entry point in a correct mannor is up to the
-  consumer of this library. This version also supports the special relocations
-  for Itanium.
+  the entry point. 
+  
+  The itanium version PE/COFF loader/relocater supports itanium and EBC image.
 
   @param  Machine   Machine type from the PE Header.
 
diff --git a/MdePkg/Library/BasePeCoffLib/PeCoffLoaderEx.c b/MdePkg/Library/BasePeCoffLib/PeCoffLoaderEx.c
index 723d24e0f4..5d2f8cb48d 100644
--- a/MdePkg/Library/BasePeCoffLib/PeCoffLoaderEx.c
+++ b/MdePkg/Library/BasePeCoffLib/PeCoffLoaderEx.c
@@ -43,6 +43,8 @@ PeCoffLoaderRelocateImageEx (
   does not mean the image can be executed it means the PE/COFF loader supports
   loading and relocating of the image type. It's up to the caller to support
   the entry point.
+  
+  The IA32/X64 version PE/COFF loader/relocater both support IA32, X64 and EBC images.
 
   @param  Machine   Machine type from the PE Header.