diff --git a/libc/arch-x86/syscalls/prctl.S b/libc/arch-x86/syscalls/prctl.S
index 1a5daca..fca343f 100644
--- a/libc/arch-x86/syscalls/prctl.S
+++ b/libc/arch-x86/syscalls/prctl.S
@@ -4,16 +4,20 @@
 
 ENTRY(prctl)
     pushl   %ebx
-    pushl   %ecx
-    pushl   %edx
-    pushl   %esi
-    pushl   %edi
-    .cfi_def_cfa_offset 20
+    .cfi_def_cfa_offset 8
     .cfi_rel_offset ebx, 0
-    .cfi_rel_offset ecx, 4
-    .cfi_rel_offset edx, 8
-    .cfi_rel_offset esi, 12
-    .cfi_rel_offset edi, 16
+    pushl   %ecx
+    .cfi_adjust_cfa_offset 4
+    .cfi_rel_offset ecx, 0
+    pushl   %edx
+    .cfi_adjust_cfa_offset 4
+    .cfi_rel_offset edx, 0
+    pushl   %esi
+    .cfi_adjust_cfa_offset 4
+    .cfi_rel_offset esi, 0
+    pushl   %edi
+    .cfi_adjust_cfa_offset 4
+    .cfi_rel_offset edi, 0
     mov     24(%esp), %ebx
     mov     28(%esp), %ecx
     mov     32(%esp), %edx