diff --git a/MdePkg/Library/BaseLib/BaseLib.inf b/MdePkg/Library/BaseLib/BaseLib.inf
index 98f721a040..5d53ffba4a 100644
--- a/MdePkg/Library/BaseLib/BaseLib.inf
+++ b/MdePkg/Library/BaseLib/BaseLib.inf
@@ -583,6 +583,7 @@
   X64/ReadCr2.asm | MSFT
   X64/ReadCr0.nasm| MSFT
   X64/ReadCr0.asm | MSFT
+  X64/ReadEflags.nasm| MSFT
   X64/ReadEflags.asm | MSFT
 
   X64/CpuBreakpoint.asm | INTEL 
@@ -724,6 +725,7 @@
   X64/ReadCr2.asm | INTEL
   X64/ReadCr0.nasm| INTEL
   X64/ReadCr0.asm | INTEL
+  X64/ReadEflags.nasm| INTEL
   X64/ReadEflags.asm | INTEL
 
   X64/Non-existing.c
diff --git a/MdePkg/Library/BaseLib/X64/ReadEflags.nasm b/MdePkg/Library/BaseLib/X64/ReadEflags.nasm
new file mode 100644
index 0000000000..3272caeb01
--- /dev/null
+++ b/MdePkg/Library/BaseLib/X64/ReadEflags.nasm
@@ -0,0 +1,39 @@
+;------------------------------------------------------------------------------
+;
+; 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:
+;
+;   ReadEflags.Asm
+;
+; Abstract:
+;
+;   AsmReadEflags function
+;
+; Notes:
+;
+;------------------------------------------------------------------------------
+
+    DEFAULT REL
+    SECTION .text
+
+;------------------------------------------------------------------------------
+; UINTN
+; EFIAPI
+; AsmReadEflags (
+;   VOID
+;   );
+;------------------------------------------------------------------------------
+global ASM_PFX(AsmReadEflags)
+ASM_PFX(AsmReadEflags):
+    pushfq
+    pop     rax
+    ret
+