diff --git a/MdePkg/Include/PiDxe.h b/MdePkg/Include/PiDxe.h
index 7b72809777..d90368b5fa 100644
--- a/MdePkg/Include/PiDxe.h
+++ b/MdePkg/Include/PiDxe.h
@@ -2,11 +2,6 @@
 
   Root include file for Mde Package DXE_CORE, DXE, SMM, SAL type modules.
 
-  This is the include file for any module of type base. Base modules only use 
-  types defined via this include file and can be ported easily to any 
-  environment. There are a set of base libraries in the Mde Package that can
-  be used to implement base modules.
-
 Copyright (c) 2006 - 2007, 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/Include/PiPei.h b/MdePkg/Include/PiPei.h
index 72fa2a9979..7124432e68 100644
--- a/MdePkg/Include/PiPei.h
+++ b/MdePkg/Include/PiPei.h
@@ -2,10 +2,9 @@
 
   Root include file for Mde Package SEC, PEIM, PEI_CORE type modules.
 
-  This is the include file for any module of type base. Base modules only use 
-  types defined via this include file and can be ported easily to any 
-  environment. There are a set of base libraries in the Mde Package that can
-  be used to implement base modules.
+  This is the include file for any module of type PEIM. PEIM
+  modules only use types defined via this include file and can
+  be ported easily to any environment. 
 
 Copyright (c) 2006 - 2007, Intel Corporation
 All rights reserved. This program and the accompanying materials
diff --git a/MdePkg/Include/Uefi.h b/MdePkg/Include/Uefi.h
index e2f68d5779..ec3b41405b 100644
--- a/MdePkg/Include/Uefi.h
+++ b/MdePkg/Include/Uefi.h
@@ -2,10 +2,9 @@
 
   Root include file for Mde Package UEFI, UEFI_APPLICATION type modules.
 
-  This is the include file for any module of type base. Base modules only use 
+  This is the include file for any module of type UEFI and UEFI_APPLICATION. Uefi modules only use 
   types defined via this include file and can be ported easily to any 
-  environment. There are a set of base libraries in the Mde Package that can
-  be used to implement base modules.
+  environment. 
 
 Copyright (c) 2006 - 2007, Intel Corporation
 All rights reserved. This program and the accompanying materials