diff --git a/ChangeLog b/ChangeLog
index 7002206427..3a47cbcaa8 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2014-10-31  Joseph Myers  <joseph@codesourcery.com>
+
+	* aclocal.m4 (GLIBC_AUTOCONF_VERSION): Mention need to update
+	install.texi in comment.
+
 2014-10-31  Torvald Riegel  <triegel@redhat.com>
 
 	* sysdeps/powerpc/bits/atomic.h (atomic_write_barrier): Remove and...
diff --git a/aclocal.m4 b/aclocal.m4
index 23569b65f7..abc34d2315 100644
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -1,6 +1,7 @@
 dnl We require that everyone use exactly the same Autoconf version so that
 dnl the internal functions defined and used by the main configure script
-dnl match those expected by the fragments.
+dnl match those expected by the fragments.  When changing this version,
+dnl install.texi also needs to be updated.
 m4_define([GLIBC_AUTOCONF_VERSION], [2.69])
 m4_if(m4_defn([AC_AUTOCONF_VERSION]), GLIBC_AUTOCONF_VERSION, [],
       [m4_fatal(m4_flatten(