diff --git a/lib/std/posix.zig b/lib/std/posix.zig
index b7335cd8916a8c45e4da2231b5a023508b6f15fd..2deeb0fad4381aa35e2055bd5dc8e33d9dbe9213 100644
--- a/lib/std/posix.zig
+++ b/lib/std/posix.zig
@@ -68,6 +68,8 @@ else switch (native_os) {
         pub const ino_t = void;
         pub const IFNAMESIZE = {};
         pub const SIG = void;
+        pub const cmsghdr = void;
+        pub const cmsg_align = {};
     },
 };