diff --git a/ANNOUNCE b/ANNOUNCE
index a29d4bc96..c90f939e0 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -1,5 +1,5 @@
 
-Libpng 1.5.5beta01 - July 10, 2011
+Libpng 1.5.5beta01 - July 11, 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.
@@ -26,8 +26,9 @@ Other information:
 
 Changes since the last public release (1.5.4):
 
-Version 1.5.5beta01 [July 10, 2011]
+Version 1.5.5beta01 [July 11, 2011]
   Fixed some typos in the manual.
+  Updated contrib/pngminus/makefile.std
 
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diff --git a/CHANGES b/CHANGES
index 547ae99c5..35f061f50 100644
--- a/CHANGES
+++ b/CHANGES
@@ -3509,8 +3509,9 @@ Version 1.5.4rc01 [June 30, 2011]
 Version 1.5.4 [July 7, 2011]
   No changes.
 
-Version 1.5.5beta01 [July 10, 2011]
+Version 1.5.5beta01 [July 11, 2011]
   Fixed some typos in the manual.
+  Updated contrib/pngminus/makefile.std
 
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 (subscription required; visit
diff --git a/contrib/pngminus/makefile.std b/contrib/pngminus/makefile.std
index 2fb061bbe..a538a69d7 100644
--- a/contrib/pngminus/makefile.std
+++ b/contrib/pngminus/makefile.std
@@ -1,16 +1,16 @@
 # Makefile for PngMinus (png2pnm and pnm2png)
 # Linux / Unix
 
-#CC=cc
-CC=gcc
-LD=$(CC)
+#CC?=cc
+CC?=gcc
+LD?=$(CC)
 
 RM=rm -f
 
 #PNGPATH = /usr/local
-#PNGINC = -I$(PNGPATH)/include/libpng12
-#PNGLIB = -L$(PNGPATH)/lib -lpng12
-#PNGLIBS = $(PNGPATH)/lib/libpng12.a
+#PNGINC = -I$(PNGPATH)/include/libpng15
+#PNGLIB = -L$(PNGPATH)/lib -lpng15
+#PNGLIBS = $(PNGPATH)/lib/libpng15.a
 PNGINC = -I../..
 PNGLIB = -L../.. -lpng
 PNGLIBS = ../../libpng.a
@@ -23,9 +23,9 @@ ZINC = -I../../../zlib
 ZLIB = -L../../../zlib -lz
 ZLIBS = ../../../zlib/libz.a
 
-CFLAGS=-O3 $(PNGINC) $(ZINC)
-LDFLAGS=$(PNGLIB) $(ZLIB)
-LDFLAGSS=$(PNGLIBS) $(ZLIBS)
+CFLAGS+=$(PNGINC) $(ZINC)
+LDLIBS=$(PNGLIB) $(ZLIB)
+LDLIBSS=$(PNGLIBS) $(ZLIBS)
 C=.c
 O=.o
 L=.a
@@ -40,19 +40,19 @@ png2pnm$(O): png2pnm$(C)
 	$(CC) -c $(CFLAGS) png2pnm$(C)
 
 png2pnm$(E): png2pnm$(O)
-	$(LD) -o png2pnm$(E) png2pnm$(O) $(LDFLAGS) -lm
+	$(LD) $(LDFLAGS) -o png2pnm$(E) png2pnm$(O) $(LDLIBS) -lm
 
 png2pnm-static$(E): png2pnm$(O)
-	$(LD) -o png2pnm-static$(E) png2pnm$(O) $(LDFLAGSS) -lm
+	$(LD) $(LDFLAGS) -o png2pnm-static$(E) png2pnm$(O) $(LDLIBSS) -lm
 
 pnm2png$(O): pnm2png$(C)
 	$(CC) -c $(CFLAGS) pnm2png$(C)
 
 pnm2png$(E): pnm2png$(O)
-	$(LD) -o pnm2png$(E) pnm2png$(O) $(LDFLAGS) -lm
+	$(LD) $(LDFLAGS) -o pnm2png$(E) pnm2png$(O) $(LDLIBS) -lm
 
 pnm2png-static$(E): pnm2png$(O)
-	$(LD) -o pnm2png-static$(E) pnm2png$(O) $(LDFLAGSS) -lm
+	$(LD) $(LDFLAGS) -o pnm2png-static$(E) pnm2png$(O) $(LDLIBSS) -lm
 
 clean:
 	$(RM) png2pnm$(O)