diff --git a/lib/mac.cc b/lib/mac.cc
index 52c2635..62f55e5 100644
--- a/lib/mac.cc
+++ b/lib/mac.cc
@@ -24,6 +24,8 @@
 #if defined(__APPLE__)
 #include <architecture/byte_order.h>
 #define htole16(x) OSSwapHostToLittleInt16(x)
+#elif defined(_WIN32)
+#define htole16(x) (x)
 #else
 #include <endian.h>
 #endif