Now including <windows.h> via a common header file specifying the minimum
Windows SDK version required

lib/zip_source_win32a.c

diff --git a/lib/zip_source_win32a.c b/lib/zip_source_win32a.c
index 1ccbd5c..c84f045 100644
--- a/lib/zip_source_win32a.c
+++ b/lib/zip_source_win32a.c
@@ -34,8 +34,8 @@
 
 #include <errno.h>
 #include <stdio.h>
-#include <windows.h>
 
+#include "zipwin32.h"
 #include "zipint.h"
 
 static void * _win32_strdup_a(const void *str);

lib/zip_source_win32file.c

diff --git a/lib/zip_source_win32file.c b/lib/zip_source_win32file.c
index 0067fad..8bb92c4 100644
--- a/lib/zip_source_win32file.c
+++ b/lib/zip_source_win32file.c
@@ -32,12 +32,12 @@
 */
 
 
-#include <windows.h>
 #include <wchar.h>
 #include <errno.h>
 #include <stdlib.h>
 #include <string.h>
 
+#include "zipwin32.h"
 #include "zipint.h"
 
 static zip_int64_t _win32_read_file(void *state, void *data, zip_uint64_t len, zip_source_cmd_t cmd);

lib/zip_source_win32utf8.c

diff --git a/lib/zip_source_win32utf8.c b/lib/zip_source_win32utf8.c
index 299a42c..55988fe 100644
--- a/lib/zip_source_win32utf8.c
+++ b/lib/zip_source_win32utf8.c
@@ -34,8 +34,8 @@
 
 #include <errno.h>
 #include <stdio.h>
-#include <windows.h>
 
+#include "zipwin32.h"
 #include "zipint.h"
 
 

lib/zip_source_win32w.c

diff --git a/lib/zip_source_win32w.c b/lib/zip_source_win32w.c
index 326e69c..7e2dc15 100644
--- a/lib/zip_source_win32w.c
+++ b/lib/zip_source_win32w.c
@@ -34,8 +34,8 @@
 
 #include <errno.h>
 #include <stdio.h>
-#include <windows.h>
 
+#include "zipwin32.h"
 #include "zipint.h"
 
 static void *_win32_strdup_w(const void *str);

lib/zipwin32.h

diff --git a/lib/zipwin32.h b/lib/zipwin32.h
new file mode 100644
index 0000000..2f21168
--- /dev/null
+++ b/lib/zipwin32.h
@@ -0,0 +1,43 @@
+#ifndef _HAD_ZIPWIN32_H
+#define _HAD_ZIPWIN32_H
+
+/*
+  zipwin32.h -- Perform the necessary incantations for windows.h
+  Copyright (C) 1999-2014 Dieter Baron and Thomas Klausner
+
+  This file is part of libzip, a library to manipulate ZIP archives.
+  The authors can be contacted at <libzip@nih.at>
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions
+  are met:
+  1. Redistributions of source code must retain the above copyright
+     notice, this list of conditions and the following disclaimer.
+  2. Redistributions in binary form must reproduce the above copyright
+     notice, this list of conditions and the following disclaimer in
+     the documentation and/or other materials provided with the
+     distribution.
+  3. The names of the authors may not be used to endorse or promote
+     products derived from this software without specific prior
+     written permission.
+ 
+  THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS
+  OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+  ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
+  DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+  GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
+  IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+  IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+/* Target Windows 2000 and later */
+#define WINVER 0x0500
+#define _WIN32_WINNT 0x0500
+#define _WIN32_WINDOWS 0x0500
+#include <windows.h>
+
+#endif /* zipwin32.h */