diff --git a/ChangeLog b/ChangeLog
index 047ab44b..a5558f5e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2003-11-04  Hrvoje Niksic  <hniksic@xemacs.org>
+
+	* configure.in: Require Autoconf 2.57.
+
 2003-11-04  Hrvoje Niksic  <hniksic@xemacs.org>
 
 	* aclocal.m4: Ditto.
diff --git a/configure.in b/configure.in
index 35eaed8a..46b4412d 100644
--- a/configure.in
+++ b/configure.in
@@ -30,7 +30,7 @@ dnl Process this file with autoconf to produce a configure script.
 dnl
 
 AC_INIT([src/version.c])
-AC_PREREQ(2.50)
+AC_PREREQ(2.57)
 
 AC_CONFIG_HEADERS([src/config.h])
 AH_BOTTOM([