diff --git a/ANNOUNCE b/ANNOUNCE
index 9f789f383b5e3a2d3a24060fc39acda53b1e4b31..f324c25571438011f444be114b0c290d8c916397 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -517,6 +517,7 @@ Version 1.6.0beta30 [September 27, 2012]
   Added a work around for GCC 4.2 optimization bug.
   Marked the broken (bad white point) original HP sRGB profiles correctly and
     correct comments.
+  Added -DZ_SOLO to contrib/pngminim/*/makefile to work with zlib-1.2.7
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
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diff --git a/CHANGES b/CHANGES
index 2a403d4f5f1fff9b45d1fca1a4e5400130c8cf03..cc91a400d5715dec3dbc54b15ebe2d26dee96102 100644
--- a/CHANGES
+++ b/CHANGES
@@ -4269,6 +4269,7 @@ Version 1.6.0beta30 [September 27, 2012]
   Added a work around for GCC 4.2 optimization bug.
   Marked the broken (bad white point) original HP sRGB profiles correctly and
     correct comments.
+  Added -DZ_SOLO to contrib/pngminim/*/makefile to work with zlib-1.2.7
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit
diff --git a/contrib/pngminim/decoder/makefile b/contrib/pngminim/decoder/makefile
index e10e1225d65b42739142928d26c9b9a6af2aedad..dafba64b74aac59fac9c437384fe54d4b219ce2a 100644
--- a/contrib/pngminim/decoder/makefile
+++ b/contrib/pngminim/decoder/makefile
@@ -14,7 +14,7 @@ LD=$(CC)
 RM=rm -f
 COPY=cp
 
-CFLAGS=-DPNG_USER_CONFIG -DNO_GZCOMPRESS -DNO_GZIP -I. -O1
+CFLAGS=-DPNG_USER_CONFIG -DNO_GZCOMPRESS -DZ_SOLO -DNO_GZIP -I. -O1
 
 C=.c
 O=.o
diff --git a/contrib/pngminim/encoder/makefile b/contrib/pngminim/encoder/makefile
index d6f39e2ea06a9b582af0a16c742de389943e3159..810b8c8faa8caa9bce3b046b463bce96848980fe 100644
--- a/contrib/pngminim/encoder/makefile
+++ b/contrib/pngminim/encoder/makefile
@@ -14,7 +14,7 @@ LD=$(CC)
 RM=rm -f
 COPY=cp
 
-CFLAGS=-DPNG_USER_CONFIG -DNO_GZIP -I. -O1
+CFLAGS=-DPNG_USER_CONFIG -DZ_SOLO -DNO_GZIP -I. -O1
 
 C=.c
 O=.o
diff --git a/contrib/pngminim/preader/makefile b/contrib/pngminim/preader/makefile
index f4b0ccdc8a9100f1e8f67fa8464c5eb35020ce44..ecc05c7bf69eab77d4a6531b4fa885f3b17734af 100644
--- a/contrib/pngminim/preader/makefile
+++ b/contrib/pngminim/preader/makefile
@@ -30,7 +30,7 @@ XLIB = -L/usr/X11R6/lib -lX11
 #LIBS = $(XLIB)
 LIBS = $(XLIB) -lm                      #platforms that need libm
 
-CFLAGS=-DPNG_USER_CONFIG -DNO_GZCOMPRESS -DNO_GZIP -I. $(XINC) -O1
+CFLAGS=-DPNG_USER_CONFIG -DNO_GZCOMPRESS -DZ_SOLO -DNO_GZIP -I. $(XINC) -O1
 
 C=.c
 O=.o