diff --git a/MdePkg/Include/Register/Amd/Fam17Msr.h b/MdePkg/Include/Register/Amd/Fam17Msr.h
index e4db09c518..716d52fd50 100644
--- a/MdePkg/Include/Register/Amd/Fam17Msr.h
+++ b/MdePkg/Include/Register/Amd/Fam17Msr.h
@@ -87,7 +87,12 @@ typedef union {
     ///
     UINT32  SevEsBit:1;
 
-    UINT32  Reserved:30;
+    ///
+    /// [Bit 2] Secure Nested Paging (SevSnp) is enabled
+    ///
+    UINT32  SevSnpBit:1;
+
+    UINT32  Reserved2:29;
   } Bits;
   ///
   /// All bit fields as a 32-bit value