#include <openssl/crypto.h>
#include <../apps/apps.h>
-#if defined(OPENSSL_SYS_UNIX) && defined(OPENSSL_THREADS)
+#if (defined(OPENSSL_SYS_UNIX) || defined(OPENSSL_SYS_CYGWIN)) && defined(OPENSSL_THREADS)
# include <unistd.h>
# if _POSIX_VERSION >= 200112L
# define ASYNC_POSIX
# endif
-#elif defined(_WIN32) || defined(__CYGWIN__)
+#elif defined(_WIN32)
# define ASYNC_WIN
#endif