diff --git a/lib/std/target.zig b/lib/std/target.zig
index d2434f7155..f93105d9d6 100644
--- a/lib/std/target.zig
+++ b/lib/std/target.zig
@@ -1071,6 +1071,7 @@ pub const Target = struct {
                     .thumbeb => .Thumb,
                     .x86 => .I386,
                     .xcore => .Unknown,
+                    .xtensa => .Unknown,
                     .nvptx => .Unknown,
                     .amdil => .Unknown,
                     .hsail => .Unknown,
@@ -1082,7 +1083,7 @@ pub const Target = struct {
                     .renderscript32 => .Unknown,
                     .aarch64_32 => .ARM64,
                     .aarch64 => .ARM64,
-                    .aarch64_be => .Unknown,
+                    .aarch64_be => .ARM64,
                     .mips64 => .Unknown,
                     .mips64el => .Unknown,
                     .powerpc64 => .Unknown,