diff -Nur tin-1.6.1.orig/configure.in tin-1.6.1/configure.in
--- tin-1.6.1.orig/configure.in	2003-08-18 11:29:27 +0600
+++ tin-1.6.1/configure.in	2003-08-18 12:57:39 +0600
@@ -37,7 +37,7 @@
 dnl
 dnl Process this file with autoconf to produce a configure script.
 
-AC_PREREQ(2.13.20020210)
+AC_PREREQ(2.13)
 AC_INIT(include/tin.h)
 AC_CONFIG_HEADER(include/autoconf.h:include/autoconf.hin)
 AC_PREFIX_DEFAULT(/usr/local)