diff --git a/MdePkg/Include/Protocol/S3SaveState.h b/MdePkg/Include/Protocol/S3SaveState.h
index a535764292..53442be2be 100644
--- a/MdePkg/Include/Protocol/S3SaveState.h
+++ b/MdePkg/Include/Protocol/S3SaveState.h
@@ -14,6 +14,10 @@
   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     
   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.             
 
+  @par Revision Reference:
+  This PPI is defined in UEFI Platform Initialization Specification 1.2 Volume 5: 
+  Standards
+
 **/
 
 #ifndef __S3_SAVE_STATE_H__
diff --git a/MdePkg/Include/Protocol/S3SmmSaveState.h b/MdePkg/Include/Protocol/S3SmmSaveState.h
index 39510f4eb8..f21975554b 100644
--- a/MdePkg/Include/Protocol/S3SmmSaveState.h
+++ b/MdePkg/Include/Protocol/S3SmmSaveState.h
@@ -21,7 +21,11 @@
   http://opensource.org/licenses/bsd-license.php                                            
 
   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     
-  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.             
+  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.   
+
+  @par Revision Reference:
+  This PPI is defined in UEFI Platform Initialization Specification 1.2 Volume 5: 
+  Standards          
 
 **/