diff --git a/libexslt/common.c b/libexslt/common.c
index 91be04fd..ff3ab755 100644
--- a/libexslt/common.c
+++ b/libexslt/common.c
@@ -1,7 +1,7 @@
 #define IN_LIBEXSLT
 #include "libexslt/libexslt.h"
 
-#if defined(WIN32) && !defined (__CYGWIN__) && (!__MINGW32__)
+#if defined(_WIN32) && !defined (__CYGWIN__) && (!__MINGW32__)
 #include <win32config.h>
 #else
 #include "config.h"
diff --git a/libexslt/crypto.c b/libexslt/crypto.c
index 64758d3c..ac390387 100644
--- a/libexslt/crypto.c
+++ b/libexslt/crypto.c
@@ -1,7 +1,7 @@
 #define IN_LIBEXSLT
 #include "libexslt/libexslt.h"
 
-#if defined(WIN32) && !defined (__CYGWIN__) && (!__MINGW32__)
+#if defined(_WIN32) && !defined (__CYGWIN__) && (!__MINGW32__)
 #include <win32config.h>
 #else
 #include "config.h"
@@ -109,7 +109,7 @@ exsltCryptoHex2Bin (const unsigned char *hex, int hexlen,
     return j;
 }
 
-#if defined(WIN32)
+#if defined(_WIN32) && !defined(__CYGWIN__)
 
 #define HAVE_CRYPTO
 #define PLATFORM_HASH	exsltCryptoCryptoApiHash
@@ -307,7 +307,7 @@ exsltCryptoCryptoApiRc4Decrypt (xmlXPathParserContextPtr ctxt,
     CryptReleaseContext (hCryptProv, 0);
 }
 
-#endif /* defined(WIN32) */
+#endif /* defined(_WIN32) */
 
 #if defined(HAVE_GCRYPT)
 
diff --git a/libexslt/date.c b/libexslt/date.c
index 0f3a21a8..4b74677f 100644
--- a/libexslt/date.c
+++ b/libexslt/date.c
@@ -22,7 +22,7 @@
 #define IN_LIBEXSLT
 #include "libexslt/libexslt.h"
 
-#if defined(WIN32) && !defined (__CYGWIN__) && (!__MINGW32__)
+#if defined(_WIN32) && !defined (__CYGWIN__) && (!__MINGW32__)
 #include <win32config.h>
 #else
 #include "config.h"
diff --git a/libexslt/dynamic.c b/libexslt/dynamic.c
index ed5965e0..dd0804bc 100644
--- a/libexslt/dynamic.c
+++ b/libexslt/dynamic.c
@@ -23,7 +23,7 @@
 #define IN_LIBEXSLT
 #include "libexslt/libexslt.h"
 
-#if defined(WIN32) && !defined (__CYGWIN__) && (!__MINGW32__)
+#if defined(_WIN32) && !defined (__CYGWIN__) && (!__MINGW32__)
 #include <win32config.h>
 #else
 #include "config.h"
diff --git a/libexslt/functions.c b/libexslt/functions.c
index 3f4e92cf..dc794e3d 100644
--- a/libexslt/functions.c
+++ b/libexslt/functions.c
@@ -1,7 +1,7 @@
 #define IN_LIBEXSLT
 #include "libexslt/libexslt.h"
 
-#if defined(WIN32) && !defined (__CYGWIN__) && (!__MINGW32__)
+#if defined(_WIN32) && !defined (__CYGWIN__) && (!__MINGW32__)
 #include <win32config.h>
 #else
 #include "config.h"
diff --git a/libexslt/libexslt.h b/libexslt/libexslt.h
index 2dd9b37b..ad9cc748 100644
--- a/libexslt/libexslt.h
+++ b/libexslt/libexslt.h
@@ -9,7 +9,7 @@
 #ifndef __XSLT_LIBEXSLT_H__
 #define __XSLT_LIBEXSLT_H__
 
-#if defined(WIN32) && !defined (__CYGWIN__) && !defined (__MINGW32__)
+#if defined(_WIN32) && !defined (__CYGWIN__) && !defined (__MINGW32__)
 #include <win32config.h>
 #else
 #include "config.h"
diff --git a/libexslt/math.c b/libexslt/math.c
index 6b24dbe0..f1aa0ba5 100644
--- a/libexslt/math.c
+++ b/libexslt/math.c
@@ -1,7 +1,7 @@
 #define IN_LIBEXSLT
 #include "libexslt/libexslt.h"
 
-#if defined(WIN32) && !defined (__CYGWIN__) && (!__MINGW32__)
+#if defined(_WIN32) && !defined (__CYGWIN__) && (!__MINGW32__)
 #include <win32config.h>
 #else
 #include "config.h"
diff --git a/libexslt/saxon.c b/libexslt/saxon.c
index 7a2f63be..15343969 100644
--- a/libexslt/saxon.c
+++ b/libexslt/saxon.c
@@ -1,7 +1,7 @@
 #define IN_LIBEXSLT
 #include "libexslt/libexslt.h"
 
-#if defined(WIN32) && !defined (__CYGWIN__) && (!__MINGW32__)
+#if defined(_WIN32) && !defined (__CYGWIN__) && (!__MINGW32__)
 #include <win32config.h>
 #else
 #include "config.h"
diff --git a/libexslt/sets.c b/libexslt/sets.c
index 8bb540d8..c7142ff1 100644
--- a/libexslt/sets.c
+++ b/libexslt/sets.c
@@ -1,7 +1,7 @@
 #define IN_LIBEXSLT
 #include "libexslt/libexslt.h"
 
-#if defined(WIN32) && !defined (__CYGWIN__) && (!__MINGW32__)
+#if defined(_WIN32) && !defined (__CYGWIN__) && (!__MINGW32__)
 #include <win32config.h>
 #else
 #include "config.h"
diff --git a/libexslt/strings.c b/libexslt/strings.c
index 24889362..14d9172f 100644
--- a/libexslt/strings.c
+++ b/libexslt/strings.c
@@ -1,7 +1,7 @@
 #define IN_LIBEXSLT
 #include "libexslt/libexslt.h"
 
-#if defined(WIN32) && !defined (__CYGWIN__) && (!__MINGW32__)
+#if defined(_WIN32) && !defined (__CYGWIN__) && (!__MINGW32__)
 #include <win32config.h>
 #else
 #include "config.h"
diff --git a/libxslt/libxslt.h b/libxslt/libxslt.h
index e6d4c831..5e98158e 100644
--- a/libxslt/libxslt.h
+++ b/libxslt/libxslt.h
@@ -10,7 +10,7 @@
 #ifndef __XSLT_LIBXSLT_H__
 #define __XSLT_LIBXSLT_H__
 
-#if defined(WIN32) && !defined (__CYGWIN__) && !defined (__MINGW32__)
+#if defined(_WIN32) && !defined (__CYGWIN__) && !defined (__MINGW32__)
 #include <win32config.h>
 #else
 #include "config.h"
diff --git a/libxslt/security.c b/libxslt/security.c
index 965175f7..9c848cc4 100644
--- a/libxslt/security.c
+++ b/libxslt/security.c
@@ -34,7 +34,7 @@
 #include <ctype.h>
 #endif
 
-#if defined(WIN32) && !defined(__CYGWIN__)
+#if defined(_WIN32) && !defined(__CYGWIN__)
 #include <windows.h>
 #ifndef INVALID_FILE_ATTRIBUTES
 #define INVALID_FILE_ATTRIBUTES ((DWORD)-1)
@@ -279,7 +279,7 @@ xsltCheckFilename (const char *path)
 {
 #ifdef HAVE_STAT
     struct stat stat_buffer;
-#if defined(WIN32) && !defined(__CYGWIN__)
+#if defined(_WIN32) && !defined(__CYGWIN__)
     DWORD dwAttrs;
 
     dwAttrs = GetFileAttributes(path);
@@ -384,7 +384,7 @@ xsltCheckWrite(xsltSecurityPrefsPtr sec,
     if ((uri->scheme == NULL) ||
 	(xmlStrEqual(BAD_CAST uri->scheme, BAD_CAST "file"))) {
 
-#if defined(WIN32) && !defined(__CYGWIN__)
+#if defined(_WIN32) && !defined(__CYGWIN__)
     if ((uri->path)&&(uri->path[0]=='/')&&
         (uri->path[1]!='\0')&&(uri->path[2]==':'))
     ret = xsltCheckWritePath(sec, ctxt, uri->path+1);
diff --git a/libxslt/xsltutils.c b/libxslt/xsltutils.c
index f023d84d..41498e04 100644
--- a/libxslt/xsltutils.c
+++ b/libxslt/xsltutils.c
@@ -42,7 +42,7 @@
 #include "imports.h"
 #include "transform.h"
 
-#if defined(WIN32) && !defined(__CYGWIN__)
+#if defined(_WIN32) && !defined(__CYGWIN__)
 #define XSLT_WIN32_PERFORMANCE_COUNTER
 #endif
 
diff --git a/win32/Makefile.msvc b/win32/Makefile.msvc
index 23a02d27..5ff7476a 100644
--- a/win32/Makefile.msvc
+++ b/win32/Makefile.msvc
@@ -51,7 +51,7 @@ CPPFLAGS = /nologo
 
 # The compiler and its options.
 CC = cl.exe
-CFLAGS = /nologo /D "WIN32" /D "_WINDOWS" /D "_MBCS" /W3 $(CRUNTIME) /D "_REENTRANT"
+CFLAGS = /nologo /D "_WINDOWS" /D "_MBCS" /W3 $(CRUNTIME) /D "_REENTRANT"
 CFLAGS = $(CFLAGS) /I$(BASEDIR) /I$(XSLT_SRCDIR) /I$(INCPREFIX)
 CFLAGS = $(CFLAGS) /D_CRT_SECURE_NO_DEPRECATE /D_CRT_NONSTDC_NO_DEPRECATE
 
diff --git a/win32/libxslt/libxslt_so.dsp b/win32/libxslt/libxslt_so.dsp
index 6cbd578b..4bc6cad1 100644
--- a/win32/libxslt/libxslt_so.dsp
+++ b/win32/libxslt/libxslt_so.dsp
@@ -42,8 +42,8 @@ RSC=rc.exe
 # PROP Intermediate_Dir "Release"
 # PROP Ignore_Export_Lib 0
 # PROP Target_Dir ""
-# ADD BASE CPP /nologo /MT /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_WINDOWS" /D "_MBCS" /D "_USRDLL" /D "LIBXSLT_SO_EXPORTS" /Yu"stdafx.h" /FD /c
-# ADD CPP /nologo /MT /W3 /GX /O2 /I "..\..\..\gnome-xml" /I "..\..\..\gnome-xml\include" /I "..\.." /D "NDEBUG" /D "_WINDOWS" /D "_MBCS" /D "_USRDLL" /D "LIBXSLT_SO_EXPORTS" /D "WIN32" /FD /c
+# ADD BASE CPP /nologo /MT /W3 /GX /O2 /D "NDEBUG" /D "_WINDOWS" /D "_MBCS" /D "_USRDLL" /D "LIBXSLT_SO_EXPORTS" /Yu"stdafx.h" /FD /c
+# ADD CPP /nologo /MT /W3 /GX /O2 /I "..\..\..\gnome-xml" /I "..\..\..\gnome-xml\include" /I "..\.." /D "NDEBUG" /D "_WINDOWS" /D "_MBCS" /D "_USRDLL" /D "LIBXSLT_SO_EXPORTS" /FD /c
 # ADD BASE MTL /nologo /D "NDEBUG" /mktyplib203 /win32
 # ADD MTL /nologo /D "NDEBUG" /mktyplib203 /win32
 # ADD BASE RSC /l 0x409 /d "NDEBUG"
@@ -68,8 +68,8 @@ LINK32=link.exe
 # PROP Intermediate_Dir "Debug"
 # PROP Ignore_Export_Lib 0
 # PROP Target_Dir ""
-# ADD BASE CPP /nologo /MTd /W3 /Gm /GX /ZI /Od /D "WIN32" /D "_DEBUG" /D "_WINDOWS" /D "_MBCS" /D "_USRDLL" /D "LIBXSLT_SO_EXPORTS" /Yu"stdafx.h" /FD /GZ /c
-# ADD CPP /nologo /MTd /W3 /Gm /GX /ZI /Od /I "..\..\..\gnome-xml\include" /I "..\..\..\gnome-xml" /I "..\.." /D "WIN32" /D "_DEBUG" /D "_WINDOWS" /D "_MBCS" /D "_USRDLL" /D "LIBXSLT_SO_EXPORTS" /FD /GZ /c
+# ADD BASE CPP /nologo /MTd /W3 /Gm /GX /ZI /Od /D "_DEBUG" /D "_WINDOWS" /D "_MBCS" /D "_USRDLL" /D "LIBXSLT_SO_EXPORTS" /Yu"stdafx.h" /FD /GZ /c
+# ADD CPP /nologo /MTd /W3 /Gm /GX /ZI /Od /I "..\..\..\gnome-xml\include" /I "..\..\..\gnome-xml" /I "..\.." /D "_DEBUG" /D "_WINDOWS" /D "_MBCS" /D "_USRDLL" /D "LIBXSLT_SO_EXPORTS" /FD /GZ /c
 # ADD BASE MTL /nologo /D "_DEBUG" /mktyplib203 /win32
 # ADD MTL /nologo /D "_DEBUG" /mktyplib203 /win32
 # ADD BASE RSC /l 0x409 /d "_DEBUG"
diff --git a/win32/libxslt/xsltproc.dsp b/win32/libxslt/xsltproc.dsp
index 5413732b..92938412 100644
--- a/win32/libxslt/xsltproc.dsp
+++ b/win32/libxslt/xsltproc.dsp
@@ -41,8 +41,8 @@ RSC=rc.exe
 # PROP Intermediate_Dir "Release"
 # PROP Ignore_Export_Lib 0
 # PROP Target_Dir ""
-# ADD BASE CPP /nologo /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c
-# ADD CPP /nologo /W3 /GX /O2 /I "..\..\..\gnome-xml\include" /I "..\..\..\gnome-xml" /I "..\.." /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c
+# ADD BASE CPP /nologo /W3 /GX /O2 /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c
+# ADD CPP /nologo /W3 /GX /O2 /I "..\..\..\gnome-xml\include" /I "..\..\..\gnome-xml" /I "..\.." /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c
 # ADD BASE RSC /l 0x409 /d "NDEBUG"
 # ADD RSC /l 0x409 /d "NDEBUG"
 BSC32=bscmake.exe
@@ -65,8 +65,8 @@ LINK32=link.exe
 # PROP Intermediate_Dir "Debug"
 # PROP Ignore_Export_Lib 0
 # PROP Target_Dir ""
-# ADD BASE CPP /nologo /W3 /Gm /GX /ZI /Od /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /GZ /c
-# ADD CPP /nologo /W3 /Gm /GX /ZI /Od /I "..\..\..\gnome-xml\include" /I "..\..\..\gnome-xml" /I "..\.." /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /GZ /c
+# ADD BASE CPP /nologo /W3 /Gm /GX /ZI /Od /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /GZ /c
+# ADD CPP /nologo /W3 /Gm /GX /ZI /Od /I "..\..\..\gnome-xml\include" /I "..\..\..\gnome-xml" /I "..\.." /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /GZ /c
 # ADD BASE RSC /l 0x409 /d "_DEBUG"
 # ADD RSC /l 0x409 /d "_DEBUG"
 BSC32=bscmake.exe
diff --git a/xsltproc/xsltproc.c b/xsltproc/xsltproc.c
index 26ad36a4..d8d26698 100644
--- a/xsltproc/xsltproc.c
+++ b/xsltproc/xsltproc.c
@@ -594,7 +594,7 @@ main(int argc, char **argv)
                    (!strcmp(argv[i], "-output")) ||
                    (!strcmp(argv[i], "--output"))) {
             i++;
-#if defined(WIN32) || defined (__CYGWIN__)
+#if defined(_WIN32) || defined (__CYGWIN__)
 	    output = (char *) xmlCanonicPath((xmlChar *) argv[i]);
             if (output == NULL)
 #endif