diff --git a/libc/arch-x86_64/syscalls/dup2.S b/libc/arch-x86_64/syscalls/dup2.S
index cc6f65b..e183e30 100644
--- a/libc/arch-x86_64/syscalls/dup2.S
+++ b/libc/arch-x86_64/syscalls/dup2.S
@@ -1,4 +1,5 @@
-/* autogenerated by gensyscalls.py */
+/* Generated by gensyscalls.py. Do not edit. */
+
 #include <asm/unistd.h>
 #include <linux/err.h>
 #include <machine/asm.h>