diff --git a/MdePkg/Include/IndustryStandard/UefiTcgPlatform.h b/MdePkg/Include/IndustryStandard/UefiTcgPlatform.h
index f55463e0e69..1e862ee7eb7 100644
--- a/MdePkg/Include/IndustryStandard/UefiTcgPlatform.h
+++ b/MdePkg/Include/IndustryStandard/UefiTcgPlatform.h
@@ -569,9 +569,16 @@ typedef struct {
   // SPDM_CERT_CHAIN                SpdmCertChain;
 } TCG_DEVICE_SECURITY_EVENT_DATA_SUB_HEADER_SPDM_CERT_CHAIN;
 
+typedef struct {
+  UINT32    Type;
+  UINT32    Length;
+  UINT8     Value[1];
+} TCG_DEVICE_SECURITY_EVENT_DATA_SUB_HEADER_OEM_MEASUREMENT;
+
 typedef union {
   TCG_DEVICE_SECURITY_EVENT_DATA_SUB_HEADER_SPDM_MEASUREMENT_BLOCK    SpdmMeasurementBlock;
   TCG_DEVICE_SECURITY_EVENT_DATA_SUB_HEADER_SPDM_CERT_CHAIN           SpdmCertChain;
+  TCG_DEVICE_SECURITY_EVENT_DATA_SUB_HEADER_OEM_MEASUREMENT           OemMeasurement;
 } TCG_DEVICE_SECURITY_EVENT_DATA_SUB_HEADER;
 
 typedef union {