diff --git a/libc/arch-x86/syscalls/dup.S b/libc/arch-x86/syscalls/dup.S
index 155de79..80259fe 100644
--- a/libc/arch-x86/syscalls/dup.S
+++ b/libc/arch-x86/syscalls/dup.S
@@ -1,12 +1,8 @@
 /* autogenerated by gensyscalls.py */
+#include <machine/asm.h>
 #include <sys/linux-syscalls.h>
 
-    .text
-    .type dup, @function
-    .globl dup
-    .align 4
-
-dup:
+ENTRY(dup)
     pushl   %ebx
     mov     8(%esp), %ebx
     movl    $__NR_dup, %eax
@@ -21,3 +17,4 @@
 1:
     popl    %ebx
     ret
+END(dup)