diff --git a/ChangeLog b/ChangeLog
index e9e3a7639..4cfdddc40 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2009-08-24  Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>
+
+	* configure.ac (AC_PREREQ): Bump to 2.64.
+
 2009-08-22  Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>
 
 	* README-maintainer-mode: Point directly to upstream locations
diff --git a/configure.ac b/configure.ac
index ad2c86a5a..643b5ab81 100644
--- a/configure.ac
+++ b/configure.ac
@@ -24,7 +24,7 @@ m4_include(config/override.m4)
 m4_include(config/proginstall.m4)
 
 AC_INIT(move-if-change)
-AC_PREREQ(2.59)
+AC_PREREQ(2.64)
 AC_DISABLE_OPTION_CHECKING
 
 progname=$0