diff --git a/libc/kernel/arch-x86/asm/ptrace.h b/libc/kernel/arch-x86/asm/ptrace.h
index 2914411..2cb1c8f 100644
--- a/libc/kernel/arch-x86/asm/ptrace.h
+++ b/libc/kernel/arch-x86/asm/ptrace.h
@@ -22,28 +22,60 @@
 #include <asm/ptrace-abi.h>
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #ifndef __ASSEMBLY__
+#ifdef __i386__
 struct pt_regs {
  long ebx;
- long ecx;
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ long ecx;
  long edx;
  long esi;
  long edi;
- long ebp;
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ long ebp;
  long eax;
  int xds;
  int xes;
- int xfs;
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ int xfs;
  long orig_eax;
  long eip;
  int xcs;
- long eflags;
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ long eflags;
  long esp;
  int xss;
 };
-#endif
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#else
+struct pt_regs {
+ unsigned long r15;
+ unsigned long r14;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ unsigned long r13;
+ unsigned long r12;
+ unsigned long rbp;
+ unsigned long rbx;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ unsigned long r11;
+ unsigned long r10;
+ unsigned long r9;
+ unsigned long r8;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ unsigned long rax;
+ unsigned long rcx;
+ unsigned long rdx;
+ unsigned long rsi;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ unsigned long rdi;
+ unsigned long orig_rax;
+ unsigned long rip;
+ unsigned long cs;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ unsigned long eflags;
+ unsigned long rsp;
+ unsigned long ss;
+};
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#endif
+#endif
 #endif