diff --git a/lib/std/c.zig b/lib/std/c.zig
index bf724f5bff157d82f1897d7a850adf66a9309488..89215a66fe43e40cd185cdc695ad6575aaea00d8 100644
--- a/lib/std/c.zig
+++ b/lib/std/c.zig
@@ -4840,12 +4840,15 @@ pub const siginfo_t = switch (native_os) {
     },
     .haiku => extern struct {
         signo: SIG,
-        code: i32,
-        errno: i32,
+        code: c_int,
+        errno: c_int,
 
         pid: pid_t,
         uid: uid_t,
         addr: *allowzero anyopaque,
+        status: c_int,
+        band: c_long,
+        value: sigval,
     },
     .openbsd => extern struct {
         signo: SIG,