diff --git a/libc/kernel/arch-x86/asm/msgbuf.h b/libc/kernel/arch-x86/asm/msgbuf.h
index 99caf76..7580210 100644
--- a/libc/kernel/arch-x86/asm/msgbuf.h
+++ b/libc/kernel/arch-x86/asm/msgbuf.h
@@ -22,20 +22,28 @@
  struct ipc64_perm msg_perm;
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  __kernel_time_t msg_stime;
+#ifdef __i386__
  unsigned long __unused1;
+#endif
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  __kernel_time_t msg_rtime;
+#ifdef __i386__
  unsigned long __unused2;
+#endif
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  __kernel_time_t msg_ctime;
+#ifdef __i386__
  unsigned long __unused3;
+#endif
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned long msg_cbytes;
  unsigned long msg_qnum;
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned long msg_qbytes;
  __kernel_pid_t msg_lspid;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  __kernel_pid_t msg_lrpid;
  unsigned long __unused4;
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned long __unused5;
 };
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #endif