diff --git a/ArmPlatformPkg/ArmPlatformPkg.dec b/ArmPlatformPkg/ArmPlatformPkg.dec
index 696d636aac..3a25ddcdc8 100644
--- a/ArmPlatformPkg/ArmPlatformPkg.dec
+++ b/ArmPlatformPkg/ArmPlatformPkg.dec
@@ -1,6 +1,6 @@
 #/** @file
 #
-#  Copyright (c) 2011-2018, ARM Limited. All rights reserved.
+#  Copyright (c) 2011-2021, ARM Limited. All rights reserved.
 #  Copyright (c) 2015, Intel Corporation. All rights reserved.
 #
 #  SPDX-License-Identifier: BSD-2-Clause-Patent
@@ -26,11 +26,28 @@
   Include                        # Root include for the package
 
 [LibraryClasses]
+  ##  @libraryclass  Provides an interface to query platform information.
+  #
   ArmPlatformLib|Include/Library/ArmPlatformLib.h
+
+  ##  @libraryclass  Provides an interface to initialize/shutdown a LCD screen.
+  #
   LcdHwLib|Include/Library/LcdHwLib.h
+
+  ##  @libraryclass  Provides an interface to configure a LCD screen.
+  #
   LcdPlatformLib|Include/Library/LcdPlatformLib.h
+
+  ##  @libraryclass  Provides a Nor flash interface.
+  #
   NorFlashPlatformLib|Include/Library/NorFlashPlatformLib.h
+
+  ##  @libraryclass  Provides an interface to the clock of a PL011 device.
+  #
   PL011UartClockLib|Include/Library/PL011UartClockLib.h
+
+  ##  @libraryclass  Provides an interface to a PL011 uart.
+  #
   PL011UartLib|Include/Library/PL011UartLib.h
 
 [Guids.common]