diff --git a/MdePkg/Include/Uefi/UefiInternalFormRepresentation.h b/MdePkg/Include/Uefi/UefiInternalFormRepresentation.h
index b8ccea2393..65758c5ab9 100644
--- a/MdePkg/Include/Uefi/UefiInternalFormRepresentation.h
+++ b/MdePkg/Include/Uefi/UefiInternalFormRepresentation.h
@@ -658,6 +658,13 @@ typedef struct {
   UINT8  Day;
 } EFI_HII_DATE;
 
+typedef struct {
+  EFI_QUESTION_ID QuestionId;
+  EFI_FORM_ID     FormId;
+  EFI_GUID        FormSetGuid;
+  EFI_STRING_ID   DevicePath;
+} EFI_HII_REF;
+
 typedef union {
   UINT8           u8;
   UINT16          u16;
@@ -667,6 +674,7 @@ typedef union {
   EFI_HII_TIME    time;
   EFI_HII_DATE    date;
   EFI_STRING_ID   string; ///< EFI_IFR_TYPE_STRING, EFI_IFR_TYPE_ACTION
+  EFI_HII_REF     ref;    ///< EFI_IFR_TYPE_REF
   // UINT8 buffer[];      ///< EFI_IFR_TYPE_ORDERED_LIST
 } EFI_IFR_TYPE_VALUE;
 
@@ -952,6 +960,11 @@ typedef struct _EFI_IFR_REF4 {
   EFI_STRING_ID            DevicePath;
 } EFI_IFR_REF4;
 
+typedef struct _EFI_IFR_REF5 {
+  EFI_IFR_OP_HEADER Header;
+  EFI_IFR_QUESTION_HEADER Question;
+} EFI_IFR_REF5;
+
 typedef struct _EFI_IFR_RESET_BUTTON {
   EFI_IFR_OP_HEADER        Header;
   EFI_IFR_STATEMENT_HEADER Statement;
@@ -1138,6 +1151,7 @@ typedef struct _EFI_IFR_ONE_OF_OPTION {
 #define EFI_IFR_TYPE_UNDEFINED         0x09
 #define EFI_IFR_TYPE_ACTION            0x0A
 #define EFI_IFR_TYPE_BUFFER            0x0B
+#define EFI_IFR_TYPE_REF               0x0C
 
 #define EFI_IFR_OPTION_DEFAULT         0x10
 #define EFI_IFR_OPTION_DEFAULT_MFG     0x20