diff --git a/lib/std/Thread.zig b/lib/std/Thread.zig
index e3345e4a4200953d6258cf269abe2ae35009f63f..45ab4d36e37eacb79dd49ac18178316c7c01823a 100644
--- a/lib/std/Thread.zig
+++ b/lib/std/Thread.zig
@@ -40,7 +40,7 @@ pub const max_name_len = switch (target.os.tag) {
     .macos, .ios, .watchos, .tvos => 63,
     .netbsd => 31,
     .freebsd => 15,
-    .openbsd => 31,
+    .openbsd => 23,
     .dragonfly => 1023,
     .solaris => 31,
     else => 0,