diff --git a/ANNOUNCE b/ANNOUNCE
index 6c9154327..579f2d6d6 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -1,5 +1,5 @@
 
-Libpng 1.7.0beta40 - November 1, 2014
+Libpng 1.7.0beta40 - November 4, 2014
 
 This is not intended to be a public release.  It will be replaced
 within a few weeks by a public version or by another test version.
@@ -620,7 +620,9 @@ Version 1.7.0beta38 [October 17, 2014]
 Version 1.7.0beta39 [November 1, 2014]
   Ported cosmetic changes from libpng-1.6.15beta02.
 
-Version 1.7.0beta40 [November 1, 2014]
+Version 1.7.0beta40 [November 4, 2014]
+  Made a one-line revision to configure.ac to support ARM on aarch64
+    (bug report by Marcin Juszkiewicz, fix by John Bowler).
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit
diff --git a/CHANGES b/CHANGES
index 46fad796e..e22579e30 100644
--- a/CHANGES
+++ b/CHANGES
@@ -4909,7 +4909,9 @@ Version 1.7.0beta38 [October 17, 2014]
 Version 1.7.0beta39 [November 1, 2014]
   Ported cosmetic changes from libpng-1.6.15beta02.
 
-Version 1.7.0beta40 [November 1, 2014]
+Version 1.7.0beta40 [November 4, 2014]
+  Made a one-line revision to configure.ac to support ARM on aarch64
+    (bug report by Marcin Juszkiewicz, fix by John Bowler).
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit
diff --git a/configure.ac b/configure.ac
index b8ae9a85b..f8de65652 100644
--- a/configure.ac
+++ b/configure.ac
@@ -426,7 +426,7 @@ AC_ARG_ENABLE([arm-neon],
 AM_CONDITIONAL([PNG_ARM_NEON],
    [test "$enable_arm_neon" != 'no' &&
     case "$host_cpu" in
-      arm*) :;;
+      arm*|aarch64*) :;;
       *)    test "$enable_arm_neon" != '';;
     esac])