diff --git a/unit_tests/efifeatures.h b/unit_tests/efifeatures.h
index c4fd5a0442..328692395b 100644
--- a/unit_tests/efifeatures.h
+++ b/unit_tests/efifeatures.h
@@ -75,3 +75,5 @@
 #define EFI_HPFP TRUE
 
 #define EFI_MAIN_RELAY_CONTROL TRUE
+
+#define EFI_ALTERNATOR_CONTROL TRUE