WIN32 -> _WIN32; see http://predef.sourceforge.net/preos.html#sec25
diff --git a/skeletons/GeneralizedTime.c b/skeletons/GeneralizedTime.c
index 9d683ef..1a16ba8 100644
--- a/skeletons/GeneralizedTime.c
+++ b/skeletons/GeneralizedTime.c
@@ -14,7 +14,7 @@
 #include <time.h>
 #endif	/* __CYGWIN__ */
 
-#if	defined(WIN32)
+#if	defined(_WIN32)
 #pragma message( "PLEASE STOP AND READ!")
 #pragma message( "  localtime_r is implemented via localtime(), which may be not thread-safe.")
 #pragma message( "  gmtime_r is implemented via gmtime(), which may be not thread-safe.")
@@ -41,7 +41,7 @@
 #define	putenv(c)	_putenv(c)
 #define	_EMULATE_TIMEGM
 
-#endif	/* WIN32 */
+#endif	/* _WIN32 */
 
 #if	defined(sun) || defined(_sun_) || defined(__solaris__)
 #define	_EMULATE_TIMEGM