diff --git a/libc/arch-x86/syscalls/dup3.S b/libc/arch-x86/syscalls/dup3.S
index 4380e6a..d1a714d 100644
--- a/libc/arch-x86/syscalls/dup3.S
+++ b/libc/arch-x86/syscalls/dup3.S
@@ -4,12 +4,14 @@
 
 ENTRY(dup3)
     pushl   %ebx
-    pushl   %ecx
-    pushl   %edx
-    .cfi_def_cfa_offset 12
+    .cfi_def_cfa_offset 8
     .cfi_rel_offset ebx, 0
-    .cfi_rel_offset ecx, 4
-    .cfi_rel_offset edx, 8
+    pushl   %ecx
+    .cfi_adjust_cfa_offset 4
+    .cfi_rel_offset ecx, 0
+    pushl   %edx
+    .cfi_adjust_cfa_offset 4
+    .cfi_rel_offset edx, 0
     mov     16(%esp), %ebx
     mov     20(%esp), %ecx
     mov     24(%esp), %edx