diff --git a/lib/std/posix.zig b/lib/std/posix.zig
index 6bed01c7142787b0fb16979802f084912cec53b6..146a521224cd1a041b9200eed79b1d1815918bfb 100644
--- a/lib/std/posix.zig
+++ b/lib/std/posix.zig
@@ -69,6 +69,8 @@ else switch (native_os) {
         pub const ino_t = void;
         pub const IFNAMESIZE = {};
         pub const SIG = void;
+        pub const cmsghdr = void;
+        pub const cmsg_align = {};
     },
 };