diff --git a/ANNOUNCE b/ANNOUNCE
index 244bf4ced..00f640e58 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -1,5 +1,5 @@
 
-Libpng 1.6.0rc06 - February 8, 2013
+Libpng 1.6.0rc06 - February 9, 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.
@@ -609,13 +609,13 @@ Version 1.6.0rc04 [February 7, 2013]
 Version 1.6.0rc05 [February 8, 2013]
   Update manual about png_get_palette_max().
 
-Version 1.6.0rc06 [February 8, 2013]
-
-  ===========================================================================
-                       NOTICE November 17, 2012:
-     The location of the git repository at SourceForge has changed.
-               Visit http://libpng.sf.net/ for details.
-  ===========================================================================
+Version 1.6.0rc06 [February 9, 2013]
+  Fixed missing dependency in --prefix builds The intermediate
+    internal 'prefix.h' file can only be generated correctly after
+    pnglibconf.h, however the dependency was not in Makefile.am.  The
+    symptoms are unpredictable depending on the order make chooses to
+    build pngprefix.h and pnglibconf.h, often the error goes unnoticed
+    because there is a system pnglibconf.h to use instead.
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit
diff --git a/CHANGES b/CHANGES
index 748a8f071..69fbfd987 100644
--- a/CHANGES
+++ b/CHANGES
@@ -4363,7 +4363,13 @@ Version 1.6.0rc04 [February 7, 2013]
 Version 1.6.0rc05 [February 8, 2013]
   Update manual about png_get_palette_max().
 
-Version 1.6.0rc06 [February 8, 2013]
+Version 1.6.0rc06 [February 9, 2013]
+  Fixed missing dependency in --prefix builds The intermediate
+    internal 'prefix.h' file can only be generated correctly after
+    pnglibconf.h, however the dependency was not in Makefile.am.  The
+    symptoms are unpredictable depending on the order make chooses to
+    build pngprefix.h and pnglibconf.h, often the error goes unnoticed
+    because there is a system pnglibconf.h to use instead.
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit
diff --git a/Makefile.am b/Makefile.am
index 357394d0b..ca44c68d4 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -119,6 +119,7 @@ $(PNGLIB_BASENAME)-config: libpng-config
 scripts/sym.out scripts/vers.out: png.h pngconf.h pnglibconf.h
 scripts/prefix.out: png.h pngconf.h pnglibconf.out
 scripts/symbols.out: png.h pngconf.h $(srcdir)/scripts/pnglibconf.h.prebuilt
+scripts/intprefix.out: pnglibconf.h
 
 libpng.sym: scripts/sym.out
 	rm -f $@