diff --git a/inc/efiapi.h b/inc/efiapi.h
index f51c0cd..1f2f479 100644
--- a/inc/efiapi.h
+++ b/inc/efiapi.h
@@ -229,6 +229,7 @@ VOID
 #define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS            0x00000010
 #define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS 0x00000020
 #define EFI_VARIABLE_APPEND_WRITE                          0x00000040
+#define EFI_VARIABLE_ENHANCED_AUTHENTICATED_ACCESS	   0x00000080
 
 // Variable size limitation
 #define EFI_MAXIMUM_VARIABLE_SIZE           1024