diff --git a/unix/zsysnum_freebsd_arm64.go b/unix/zsysnum_freebsd_arm64.go
index 8c1e16ca..9f21e955 100644
--- a/unix/zsysnum_freebsd_arm64.go
+++ b/unix/zsysnum_freebsd_arm64.go
@@ -1,4 +1,4 @@
-// mksysnum_freebsd.pl
+// go run mksysnum.go https://svn.freebsd.org/base/stable/10/sys/kern/syscalls.master
 // Code generated by the command above; see README.md. DO NOT EDIT.
 
 // +build arm64,freebsd
diff --git a/unix/zsysnum_netbsd_arm64.go b/unix/zsysnum_netbsd_arm64.go
index 2c6d08da..0291c093 100644
--- a/unix/zsysnum_netbsd_arm64.go
+++ b/unix/zsysnum_netbsd_arm64.go
@@ -1,4 +1,4 @@
-// mksysnum_netbsd.pl
+// go run mksysnum.go http://cvsweb.netbsd.org/bsdweb.cgi/~checkout~/src/sys/kern/syscalls.master
 // Code generated by the command above; DO NOT EDIT.
 
 // +build arm64,netbsd