diff --git a/MdePkg/Include/Protocol/IpSec.h b/MdePkg/Include/Protocol/IpSec.h
index f5571db645..24147e262e 100644
--- a/MdePkg/Include/Protocol/IpSec.h
+++ b/MdePkg/Include/Protocol/IpSec.h
@@ -20,7 +20,7 @@
   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 
   @par Revision Reference:          
-  This Protocol is introduced in UEFI Specification 2.3
+  The EFI_IPSEC2_PROTOCOL is introduced in UEFI Specification 2.3D.
 
 **/