diff --git a/mingw-w64-zlib/0001-unzip-add-function-unzOpenBuffer.patch b/mingw-w64-zlib/0001-unzip-add-function-unzOpenBuffer.patch
new file mode 100644
index 0000000000..89e8ade418
--- /dev/null
+++ b/mingw-w64-zlib/0001-unzip-add-function-unzOpenBuffer.patch
@@ -0,0 +1,68 @@
+From 0a0d78034efbc45c103b1fbbb47343c48cdf6355 Mon Sep 17 00:00:00 2001
+From: martell <martellmalone@gmail.com>
+Date: Sat, 11 Oct 2014 03:32:38 +0100
+Subject: [PATCH] unzip: add function unzOpenBuffer
+
+---
+ Makefile.am |  1 +
+ unzip.c     | 11 +++++++++++
+ unzip.h     |  2 ++
+ 3 files changed, 14 insertions(+)
+
+diff --git a/Makefile.am b/Makefile.am
+index d83fee7..e2958e6 100644
+--- a/Makefile.am
++++ b/Makefile.am
+@@ -19,6 +19,7 @@ libminizip_la_SOURCES = \
+ 	ioapi.c \
+ 	unzip.c \
+ 	zip.c \
++	ioapi_mem.c \
+ 	${iowin32_src}
+ 
+ libminizip_la_LDFLAGS = $(AM_LDFLAGS) -version-info 1:0:0 -lz
+diff --git a/unzip.c b/unzip.c
+index ce02265..bb72a66 100644
+--- a/unzip.c
++++ b/unzip.c
+@@ -26,6 +26,7 @@
+ 
+ #include "zlib.h"
+ #include "unzip.h"
++#include "ioapi_mem.h"
+ 
+ #ifdef STDC
+ #  include <stddef.h>
+@@ -581,6 +582,16 @@ extern unzFile ZEXPORT unzOpen64(const void *path)
+     return unzOpenInternal(path, NULL, 1);
+ }
+ 
++extern unzFile ZEXPORT unzOpenBuffer(const  void* buffer, uLong size)
++{
++    char path[48] = {0};
++    ourmemory_t FileMemory;
++    zlib_filefunc64_32_def memory_file;
++    sprintf(path, "%llx %lx", (unsigned long long)buffer, (unsigned long)size);
++    fill_memory_filefunc(&memory_file, &FileMemory);
++    return unzOpenInternal(path, &memory_file, 0);
++}
++
+ extern int ZEXPORT unzClose(unzFile file)
+ {
+     unz64_s* s;
+diff --git a/unzip.h b/unzip.h
+index 22c830f..28fedb9 100644
+--- a/unzip.h
++++ b/unzip.h
+@@ -143,6 +143,8 @@ extern unzFile ZEXPORT unzOpen64 OF((const void *path));
+    open64_file_func callback. Under Windows, if UNICODE is defined, using fill_fopen64_filefunc, the path 
+    is a pointer to a wide unicode string  (LPCTSTR is LPCWSTR), so const char* does not describe the reality */
+ 
++extern unzFile ZEXPORT unzOpenBuffer OF((const void* buffer, uLong size));
++/* Open a Zip file, like unzOpen, but from a buffer */
+ extern unzFile ZEXPORT unzOpen2 OF((const char *path, zlib_filefunc_def* pzlib_filefunc_def));
+ /* Open a Zip file, like unzOpen, but provide a set of file low level API for read/write operations */
+ extern unzFile ZEXPORT unzOpen2_64 OF((const void *path, zlib_filefunc64_def* pzlib_filefunc_def));
+-- 
+2.1.2
+
diff --git a/mingw-w64-zlib/PKGBUILD b/mingw-w64-zlib/PKGBUILD
index bc90abe8d6..13f677bbf4 100644
--- a/mingw-w64-zlib/PKGBUILD
+++ b/mingw-w64-zlib/PKGBUILD
@@ -15,12 +15,14 @@ depends=("${MINGW_PACKAGE_PREFIX}-bzip2")
 options=('staticlibs')
 source=("http://zlib.net/current/${_realname}-${pkgver}.tar.gz"
         "git://github.com/nmoinvaz/minizip.git"
+        "0001-unzip-add-function-unzOpenBuffer.patch"
         01-zlib-1.2.7-1-buildsys.mingw.patch
         02-no-undefined.mingw.patch
         03-dont-put-sodir-into-L.mingw.patch
         04-wrong-w8-check.mingw.patch
         05-fix-a-typo.mingw.patch)
 md5sums=('44d667c142d7cda120332623eab69f40'
+         'SKIP'
          'SKIP'
          '63affd37e371768c6adc6e6561e66daf'
          'cf7e49f23103a7e42c2dee113ea29674'
@@ -41,6 +43,10 @@ prepare() {
   rm -rf ${srcdir}/${_realname}-${pkgver}/contrib/minizip
   cp -r ${srcdir}/minizip/ ${srcdir}/${_realname}-${pkgver}/contrib
 
+  cd ${srcdir}/${_realname}-${pkgver}/contrib/minizip
+
+  git am ${srcdir}/0001-unzip-add-function-unzOpenBuffer.patch
+
 }
 
 build() {