diff --git a/MdePkg/Library/BaseLib/BaseLib.inf b/MdePkg/Library/BaseLib/BaseLib.inf
index bd3e6b3f63..fc13d8b133 100644
--- a/MdePkg/Library/BaseLib/BaseLib.inf
+++ b/MdePkg/Library/BaseLib/BaseLib.inf
@@ -523,6 +523,7 @@
   X64/ReadGdtr.asm | MSFT
   X64/ReadTr.nasm| MSFT
   X64/ReadTr.asm | MSFT
+  X64/ReadSs.nasm| MSFT
   X64/ReadSs.asm | MSFT
   X64/ReadGs.asm | MSFT
   X64/ReadFs.asm | MSFT
@@ -634,6 +635,7 @@
   X64/ReadGdtr.asm | INTEL
   X64/ReadTr.nasm| INTEL
   X64/ReadTr.asm | INTEL
+  X64/ReadSs.nasm| INTEL
   X64/ReadSs.asm | INTEL
   X64/ReadGs.asm | INTEL
   X64/ReadFs.asm | INTEL
diff --git a/MdePkg/Library/BaseLib/X64/ReadSs.nasm b/MdePkg/Library/BaseLib/X64/ReadSs.nasm
new file mode 100644
index 0000000000..83fb1dc5eb
--- /dev/null
+++ b/MdePkg/Library/BaseLib/X64/ReadSs.nasm
@@ -0,0 +1,38 @@
+;------------------------------------------------------------------------------
+;
+; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
+; This program and the accompanying materials
+; are licensed and made available under the terms and conditions of the BSD License
+; which accompanies this distribution.  The full text of the license may be found at
+; 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.
+;
+; Module Name:
+;
+;   ReadSs.Asm
+;
+; Abstract:
+;
+;   AsmReadSs function
+;
+; Notes:
+;
+;------------------------------------------------------------------------------
+
+    DEFAULT REL
+    SECTION .text
+
+;------------------------------------------------------------------------------
+; UINT16
+; EFIAPI
+; AsmReadSs (
+;   VOID
+;   );
+;------------------------------------------------------------------------------
+global ASM_PFX(AsmReadSs)
+ASM_PFX(AsmReadSs):
+    mov     eax, ss
+    ret
+