diff --git a/include/utils/Compat.h b/include/utils/Compat.h
index 0df40a1..a238afe 100644
--- a/include/utils/Compat.h
+++ b/include/utils/Compat.h
@@ -35,6 +35,12 @@
 
 #endif /* __APPLE__ */
 
+#if defined(_WIN32)
+#define O_CLOEXEC 0
+#define O_NOFOLLOW 0
+#define DEFFILEMODE 0666
+#endif /* _WIN32 */
+
 #if HAVE_PRINTF_ZD
 #  define ZD "%zd"
 #  define ZD_TYPE ssize_t