diff --git a/lib/std/Target.zig b/lib/std/Target.zig
index d4685cb6ba666b81bb803768faf7dae134575c16..d00c8342578836aa4f37064c6929f5b31f1dcde8 100644
--- a/lib/std/Target.zig
+++ b/lib/std/Target.zig
@@ -2046,6 +2046,7 @@ pub const Cpu = struct {
                 },
                 .armeb, .thumbeb => &arm.cpu.baseline,
                 .aarch64 => switch (os.tag) {
+                    .haiku => &aarch64.cpu.cortex_a55,
                     .driverkit, .maccatalyst, .macos => &aarch64.cpu.apple_m1,
                     .ios, .tvos => &aarch64.cpu.apple_a7,
                     .visionos => &aarch64.cpu.apple_m2,