diff --git a/Makefile.d/arch_test.h b/Makefile.d/arch_test.h
index 99f84d0..04aa121 100644
--- a/Makefile.d/arch_test.h
+++ b/Makefile.d/arch_test.h
@@ -45,6 +45,8 @@
 	#define __FLASHROM_ARCH__ "s390"
 #elif defined(__arc__)
 	#define __FLASHROM_ARCH__ "arc"
+#elif defined(__ARC64__)
+	#define __FLASHROM_ARCH__ "arc64"
 #elif defined(__e2k__)
 	#define __FLASHROM_ARCH__ "e2k"
 #else