diff --git a/ANNOUNCE b/ANNOUNCE
index 9016f47da..0646a2bdd 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -1,5 +1,5 @@
 
-Libpng 1.6.0rc04 - February 5, 2013
+Libpng 1.6.0rc04 - February 7, 2013
 
 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.
@@ -603,8 +603,8 @@ Version 1.6.0rc02 [February 4, 2013]
 Version 1.6.0rc03 [February 5, 2013]
   Fixed the png_get_palette_max API.
 
-Version 1.6.0rc04 [February 5, 2013]
-
+Version 1.6.0rc04 [February 7, 2013]
+  Turn serial tests back on (recently turned off by autotools upgrade).
 
   ===========================================================================
                        NOTICE November 17, 2012:
diff --git a/CHANGES b/CHANGES
index 36414bd49..c2f7034d2 100644
--- a/CHANGES
+++ b/CHANGES
@@ -4357,7 +4357,8 @@ Version 1.6.0rc02 [February 4, 2013]
 Version 1.6.0rc03 [February 5, 2013]
   Fixed the png_get_palette_max API.
 
-Version 1.6.0rc04 [February 5, 2013]
+Version 1.6.0rc04 [February 7, 2013]
+  Turn serial tests back on (recently turned off by autotools upgrade).
 
   ===========================================================================
                        NOTICE November 17, 2012:
diff --git a/configure.ac b/configure.ac
index e627f6e71..094e74acb 100644
--- a/configure.ac
+++ b/configure.ac
@@ -26,7 +26,7 @@ AC_CONFIG_MACRO_DIR([scripts])
 # silent-rules requires automake 1.11 or later
 # dist-xz requires automake 1.11 or later
 # 1.12.2 fixes a security issue in 1.11.2 and 1.12.1
-AM_INIT_AUTOMAKE([1.12.2 foreign dist-xz color-tests silent-rules])
+AM_INIT_AUTOMAKE([1.12.2 foreign dist-xz color-tests silent-rules serial-tests])
 # was:
 # AM_INIT_AUTOMAKE
 AM_MAINTAINER_MODE