1 files changed, 20 insertions, 2 deletions
diff --git a/MdePkg/Include/IndustryStandard/Tpm12.h b/MdePkg/Include/IndustryStandard/Tpm12.h
index 155dcc9f5f..0e5a9019e8 100644
--- a/MdePkg/Include/IndustryStandard/Tpm12.h
+++ b/MdePkg/Include/IndustryStandard/Tpm12.h
@@ -10,6 +10,14 @@
 #define _TPM12_H_
 
 ///
+/// Temporary disable 4201 to support anonymous unions
+///
+#if defined (_MSC_EXTENSIONS)
+#pragma warning( push )
+#pragma warning ( disable : 4201 )
+#endif
+
+///
 /// The start of TPM return codes
 ///
 #define TPM_BASE  0
@@ -744,8 +752,11 @@ typedef struct tdTPM_PERMANENT_FLAGS {
   BOOLEAN              TPMpost;
   BOOLEAN              TPMpostLock;
   BOOLEAN              FIPS;
-  BOOLEAN                           operator;
-  BOOLEAN                           enableRevokeEK;
+  union {
+    BOOLEAN            operator;
+    BOOLEAN            operator_;
+  };
+  BOOLEAN              enableRevokeEK;
   BOOLEAN              nvLocked;
   BOOLEAN              readSRKPub;
   BOOLEAN              tpmEstablished;
@@ -2162,4 +2173,11 @@ typedef struct tdTPM_RSP_COMMAND_HDR {
 
 #pragma pack ()
 
+///
+/// Temporary disable 4201 to support anonymous unions
+///
+#if defined (_MSC_EXTENSIONS)
+#pragma warning( pop )
+#endif
+
 #endif