diff --git a/lib/std/c.zig b/lib/std/c.zig
index ffb3a9d783571b7ac93324e2f68c40c006592c9d..498775558b4a52aa751c40f8720df1c1f57bff31 100644
--- a/lib/std/c.zig
+++ b/lib/std/c.zig
@@ -4874,9 +4874,9 @@ pub const siginfo_t = switch (native_os) {
         data: extern union {
             proc: extern struct {
                 pid: pid_t,
+                uid: uid_t,
                 pdata: extern union {
                     kill: extern struct {
-                        uid: uid_t,
                         value: sigval,
                     },
                     cld: extern struct {