diff --git a/lib/std/c/openbsd.zig b/lib/std/c/openbsd.zig
index 3551f50020..07a8237311 100644
--- a/lib/std/c/openbsd.zig
+++ b/lib/std/c/openbsd.zig
@@ -1127,7 +1127,7 @@ pub usingnamespace switch (builtin.cpu.arch) {
             sc_cookie: c_long,
         };
     },
-    .arm64 => struct {
+    .aarch64 => struct {
         pub const ucontext_t = extern struct {
             __sc_unused: c_int,
             sc_mask: c_int,