diff --git a/ChangeLog b/ChangeLog
index b65a40c..2dd1c46 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,10 @@
 2009-08-15  Bruno Haible  <bruno@clisp.org>
 
+	* Makefile.devel (AUTOCONF, AUTOHEADER): Switch to version 2.64.
+	* preload/Makefile.devel (AUTOCONF): Likewise.
+
+2009-08-15  Bruno Haible  <bruno@clisp.org>
+
 	Use .git/info/exclude, not .gitignore, for imported or generated files.
 	* Makefile.devel (srclib/Makefile.gnulib): Pass option --no-vc-files to
 	gnulib-tool.
diff --git a/Makefile.devel b/Makefile.devel
index 7dc9bf2..429051f 100644
--- a/Makefile.devel
+++ b/Makefile.devel
@@ -4,8 +4,8 @@
 
 SHELL = /bin/sh
 MAKE = make
-AUTOCONF = autoconf-2.63
-AUTOHEADER = autoheader-2.63
+AUTOCONF = autoconf-2.64
+AUTOHEADER = autoheader-2.64
 AUTOMAKE = automake-1.11
 ACLOCAL = aclocal-1.11
 GPERF = gperf
diff --git a/libcharset/ChangeLog b/libcharset/ChangeLog
index 5dffa46..318f46f 100644
--- a/libcharset/ChangeLog
+++ b/libcharset/ChangeLog
@@ -1,3 +1,7 @@
+2009-08-15  Bruno Haible  <bruno@clisp.org>
+
+	* Makefile.devel (AUTOCONF, AUTOHEADER): Switch to version 2.64.
+
 2009-05-19  Bruno Haible  <bruno@clisp.org>
 
 	* Makefile.devel (AUTOMAKE, ACLOCAL): Switch to version 1.11.
diff --git a/libcharset/Makefile.devel b/libcharset/Makefile.devel
index ca35f64..b65949f 100644
--- a/libcharset/Makefile.devel
+++ b/libcharset/Makefile.devel
@@ -3,8 +3,8 @@
 
 SHELL = /bin/sh
 MAKE = make
-AUTOCONF = autoconf-2.63
-AUTOHEADER = autoheader-2.63
+AUTOCONF = autoconf-2.64
+AUTOHEADER = autoheader-2.64
 ACLOCAL = aclocal-1.11
 CP = cp
 RM = rm -f
diff --git a/preload/Makefile.devel b/preload/Makefile.devel
index f411571..9529d77 100644
--- a/preload/Makefile.devel
+++ b/preload/Makefile.devel
@@ -3,7 +3,7 @@
 
 SHELL = /bin/sh
 MAKE = make
-AUTOCONF = autoconf-2.63
+AUTOCONF = autoconf-2.64
 ACLOCAL = aclocal-1.11
 CP = cp
 RM = rm -f