oops
diff --git a/skeletons/GeneralizedTime.c b/skeletons/GeneralizedTime.c
index cbb4c7d..687ccd4 100644
--- a/skeletons/GeneralizedTime.c
+++ b/skeletons/GeneralizedTime.c
@@ -9,7 +9,7 @@
#include <assert.h>
#endif /* __NO_ASSERT_H__ */
-#if defined(WIN32) && defined(__CYGWIN__)
+#if defined(WIN32) || defined(__CYGWIN__)
#warning PLEASE STOP AND READ!
#warning localtime_r is implemented via localtime(), which is not thread-safe.
#warning gmtime_r is implemented via gmtime(), which is not thread-safe.