diff --git a/MdePkg/Include/Library/BaseLib.h b/MdePkg/Include/Library/BaseLib.h
index 2a75bc023f..ecadff8b23 100644
--- a/MdePkg/Include/Library/BaseLib.h
+++ b/MdePkg/Include/Library/BaseLib.h
@@ -5387,10 +5387,19 @@ typedef union {
     UINT32  OSXMMEXCPT:1;   ///< Operating System Support for
                             ///< Unmasked SIMD Floating Point
                             ///< Exceptions.
-    UINT32  Reserved_2:1;   ///< Reserved.
+    UINT32  UMIP:1;         ///< User-Mode Instruction Prevention.
     UINT32  LA57:1;         ///< Linear Address 57bit.
-    UINT32  VMXE:1;         ///< VMX Enable
-    UINT32  Reserved_1:18;  ///< Reserved.
+    UINT32  VMXE:1;         ///< VMX Enable.
+    UINT32  SMXE:1;         ///< SMX Enable.
+    UINT32  Reserved_3:1;   ///< Reserved.
+    UINT32  FSGSBASE:1;     ///< FSGSBASE Enable.
+    UINT32  PCIDE:1;        ///< PCID Enable.
+    UINT32  OSXSAVE:1;      ///< XSAVE and Processor Extended States Enable.
+    UINT32  Reserved_4:1;   ///< Reserved.
+    UINT32  SMEP:1;         ///< SMEP Enable.
+    UINT32  SMAP:1;         ///< SMAP Enable.
+    UINT32  PKE:1;          ///< Protection-Key Enable.
+    UINT32  Reserved_5:9;   ///< Reserved.
   } Bits;
   UINTN     UintN;
 } IA32_CR4;