diff --git a/MdePkg/Include/Uefi/UefiInternalFormRepresentation.h b/MdePkg/Include/Uefi/UefiInternalFormRepresentation.h
index 100176c619..be8c7062d9 100644
--- a/MdePkg/Include/Uefi/UefiInternalFormRepresentation.h
+++ b/MdePkg/Include/Uefi/UefiInternalFormRepresentation.h
@@ -769,6 +769,7 @@ typedef union {
 #define EFI_IFR_CATENATE_OP            0x5E
 #define EFI_IFR_GUID_OP                0x5F
 #define EFI_IFR_SECURITY_OP            0x60
+#define EFI_IFR_MODAL_TAG_OP           0x61
 
 //
 // Definitions of IFR Standard Headers
@@ -873,6 +874,10 @@ typedef struct _EFI_IFR_IMAGE {
   EFI_IMAGE_ID             Id;
 } EFI_IFR_IMAGE;
 
+typedef struct _EFI_IFR_MODAL {
+  EFI_IFR_OP_HEADER        Header;
+} EFI_IFR_MODAL;
+
 typedef struct _EFI_IFR_LOCKED {
   EFI_IFR_OP_HEADER        Header;
 } EFI_IFR_LOCKED;