added HAVE_ERRNO_H definition
diff --git a/include/win32config.h b/include/win32config.h
index a639b07..0f604a3 100644
--- a/include/win32config.h
+++ b/include/win32config.h
@@ -59,6 +59,8 @@
 #define ENOTEMPTY               WSAENOTEMPTY
 */
 
+#else
+#define HAVE_ERRNO_H
 #endif /* NEED_SOCKETS */
 
 #define HAVE_ISINF