diff --git a/lib/std/os/linux.zig b/lib/std/os/linux.zig
index 45cf597c76974e13db6b55d80db988542406f6b4..55a8297464a03aac78dc4d0b6b26a8668e53f298 100644
--- a/lib/std/os/linux.zig
+++ b/lib/std/os/linux.zig
@@ -3614,8 +3614,7 @@ pub const PROT = struct {
     pub const EXEC = 0x4;
     /// page may be used for atomic ops
     pub const SEM = switch (native_arch) {
-        // TODO: also xtensa
-        .mips, .mipsel, .mips64, .mips64el => 0x10,
+        .mips, .mipsel, .mips64, .mips64el, .xtensa => 0x10,
         else => 0x8,
     };
     /// mprotect flag: extend change to start of growsdown vma