diff --git a/ANNOUNCE b/ANNOUNCE
index c90f939e0..e6fd6d2c5 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -1,5 +1,5 @@
 
-Libpng 1.5.5beta01 - July 11, 2011
+Libpng 1.5.5beta01 - July 12, 2011
 
 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.
@@ -26,9 +26,9 @@ Other information:
 
 Changes since the last public release (1.5.4):
 
-Version 1.5.5beta01 [July 11, 2011]
+Version 1.5.5beta01 [July 12, 2011]
   Fixed some typos in the manual.
-  Updated contrib/pngminus/makefile.std
+  Updated contrib/pngminus/makefile.std (Samuli Souminen)
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net:
 (subscription required; visit
diff --git a/CHANGES b/CHANGES
index 35f061f50..5725fc251 100644
--- a/CHANGES
+++ b/CHANGES
@@ -3509,9 +3509,9 @@ Version 1.5.4rc01 [June 30, 2011]
 Version 1.5.4 [July 7, 2011]
   No changes.
 
-Version 1.5.5beta01 [July 11, 2011]
+Version 1.5.5beta01 [July 12, 2011]
   Fixed some typos in the manual.
-  Updated contrib/pngminus/makefile.std
+  Updated contrib/pngminus/makefile.std (Samuli Souminen)
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit
diff --git a/contrib/pngminus/makefile.std b/contrib/pngminus/makefile.std
index a538a69d7..fa7b5909f 100644
--- a/contrib/pngminus/makefile.std
+++ b/contrib/pngminus/makefile.std
@@ -1,9 +1,9 @@
 # Makefile for PngMinus (png2pnm and pnm2png)
 # Linux / Unix
 
-#CC?=cc
-CC?=gcc
-LD?=$(CC)
+#CC=cc
+CC=gcc
+LD=$(CC)
 
 RM=rm -f
 
@@ -23,7 +23,7 @@ ZINC = -I../../../zlib
 ZLIB = -L../../../zlib -lz
 ZLIBS = ../../../zlib/libz.a
 
-CFLAGS+=$(PNGINC) $(ZINC)
+CFLAGS=$(PNGINC) $(ZINC)
 LDLIBS=$(PNGLIB) $(ZLIB)
 LDLIBSS=$(PNGLIBS) $(ZLIBS)
 C=.c