diff --git a/libc/arch-arm/syscalls/sigaltstack.S b/libc/arch-arm/syscalls/sigaltstack.S
index 3625d0b..b541a87 100644
--- a/libc/arch-arm/syscalls/sigaltstack.S
+++ b/libc/arch-arm/syscalls/sigaltstack.S
@@ -1,13 +1,8 @@
 /* autogenerated by gensyscalls.py */
+#include <machine/asm.h>
 #include <sys/linux-syscalls.h>
 
-    .text
-    .type sigaltstack, #function
-    .globl sigaltstack
-    .align 4
-    .fnstart
-
-sigaltstack:
+ENTRY(sigaltstack)
     .save   {r4, r7}
     stmfd   sp!, {r4, r7}
     ldr     r7, =__NR_sigaltstack
@@ -16,4 +11,4 @@
     movs    r0, r0
     bxpl    lr
     b       __set_syscall_errno
-    .fnend
+END(sigaltstack)