diff --git a/MdePkg/Include/IndustryStandard/IpmiNetFnApp.h b/MdePkg/Include/IndustryStandard/IpmiNetFnApp.h
index b6bc91f46c..fcb190f2c6 100644
--- a/MdePkg/Include/IndustryStandard/IpmiNetFnApp.h
+++ b/MdePkg/Include/IndustryStandard/IpmiNetFnApp.h
@@ -1092,6 +1092,14 @@ typedef struct {
   UINT8                                          InputMaxMsgSize;
 } IPMI_GET_SYSTEM_INTERFACE_KCS_SMIC_CAPABILITIES_RESPONSE;
 
+//
+// Response of interface capability of SSIF/KCS/SMIC.
+//
+typedef union {
+  IPMI_GET_SYSTEM_INTERFACE_SSIF_CAPABILITIES_RESPONSE        *InterfaceSsifCapability;
+  IPMI_GET_SYSTEM_INTERFACE_KCS_SMIC_CAPABILITIES_RESPONSE    *InterfaceKcsSmicCapability;
+} IPMI_GET_SYSTEM_INTERFACE_CAPABILITIES_RESPONSE;
+
 //
 //  Definitions for Get System Interface Capabilities command SSIF transaction support
 //