diff --git a/ANNOUNCE b/ANNOUNCE
index 9f789f383..f324c2557 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
 
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diff --git a/CHANGES b/CHANGES
index 2a403d4f5..cc91a400d 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 e10e1225d..dafba64b7 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 d6f39e2ea..810b8c8fa 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 f4b0ccdc8..ecc05c7bf 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