diff --git a/MdePkg/Include/Uefi/UefiSpec.h b/MdePkg/Include/Uefi/UefiSpec.h
index 115a82bfc7..f389693845 100644
--- a/MdePkg/Include/Uefi/UefiSpec.h
+++ b/MdePkg/Include/Uefi/UefiSpec.h
@@ -1720,6 +1720,10 @@ EFI_STATUS
   OUT UINT64            *MaximumVariableSize
   );
 
+//
+// Firmware should stop at a firmware user interface on next boot
+//
+#define EFI_OS_INDICATIONS_BOOT_TO_FW_UI    0x0000000000000001
 
 //
 // EFI Runtime Services Table