diff --git a/MdePkg/Include/IndustryStandard/Tpm12.h b/MdePkg/Include/IndustryStandard/Tpm12.h
index 5ba4bb44d8..1d489815ca 100644
--- a/MdePkg/Include/IndustryStandard/Tpm12.h
+++ b/MdePkg/Include/IndustryStandard/Tpm12.h
@@ -1012,9 +1012,6 @@ typedef struct tdTPM_EK_BLOB_AUTH
 } TPM_EK_BLOB_AUTH;
 
 
-// TPM_CHOSENID_HASH = SHA(identityLabel || privacyCA)
-typedef TPM_DIGEST                  TPM_CHOSENID_HASH;
-
 typedef struct tdTPM_IDENTITY_CONTENTS
 {
     TPM_STRUCT_VER                  ver;