diff --git a/util/cbfstool/cbfs.h b/util/cbfstool/cbfs.h
index 82cbfb3e44..c1f10b2df4 100644
--- a/util/cbfstool/cbfs.h
+++ b/util/cbfstool/cbfs.h
@@ -41,6 +41,7 @@ struct cbfs_header {
 #define CBFS_ARCHITECTURE_UNKNOWN  0xFFFFFFFF
 #define CBFS_ARCHITECTURE_X86      0x00000001
 #define CBFS_ARCHITECTURE_ARM      0x00000010
+#define CBFS_ARCHITECTURE_AARCH64  0x0000aa64
 
 #define CBFS_FILE_MAGIC "LARCHIVE"
 
diff --git a/util/cbfstool/cbfstool.c b/util/cbfstool/cbfstool.c
index dceca9f535..33f4cf41b0 100644
--- a/util/cbfstool/cbfstool.c
+++ b/util/cbfstool/cbfstool.c
@@ -520,7 +520,7 @@ static void usage(char *name)
 			"Updates the FIT table with microcode entries\n"
 	     "\n"
 	     "ARCHes:\n"
-	     "  arm, x86\n"
+	     "  aarch64, arm, x86\n"
 	     "TYPEs:\n", name, name
 	    );
 	print_supported_filetypes();
diff --git a/util/cbfstool/common.c b/util/cbfstool/common.c
index 10faffd335..e6bf5555c3 100644
--- a/util/cbfstool/common.c
+++ b/util/cbfstool/common.c
@@ -113,6 +113,7 @@ static struct {
 	uint32_t arch;
 	const char *name;
 } arch_names[] = {
+	{ CBFS_ARCHITECTURE_AARCH64, "aarch64" },
 	{ CBFS_ARCHITECTURE_ARM, "arm" },
 	{ CBFS_ARCHITECTURE_X86, "x86" },
 	{ CBFS_ARCHITECTURE_UNKNOWN, "unknown" }