diff --git a/libc/arch-x86/syscalls/getsockopt.S b/libc/arch-x86/syscalls/getsockopt.S
index 4f2c19a..9c02d23 100644
--- a/libc/arch-x86/syscalls/getsockopt.S
+++ b/libc/arch-x86/syscalls/getsockopt.S
@@ -5,6 +5,9 @@
 ENTRY(getsockopt)
     pushl   %ebx
     pushl   %ecx
+    .cfi_def_cfa_offset 8
+    .cfi_rel_offset ebx, 0
+    .cfi_rel_offset ecx, 4
     mov     $15, %ebx
     mov     %esp, %ecx
     addl    $12, %ecx