diff --git include/msgpack/v1/vrefbuffer.hpp include/msgpack/v1/vrefbuffer.hpp
--- include/msgpack/v1/vrefbuffer.hpp
+++ include/msgpack/v1/vrefbuffer.hpp
@@ -28,4 +28,12 @@
-struct iovec {
-    void  *iov_base;
-    size_t iov_len;
-};
+#ifndef _WS2DEF_
+#include <Winsock2.h>
+#endif
+#ifndef iovec
+#define iovec _WSABUF
+#endif
+#ifndef iov_base
+#define iov_base buf
+#endif
+#ifndef iov_len
+#define iov_len len
+#endif
@@ -171,1 +179,1 @@
-                const_cast<const void *>((m_tail - 1)->iov_base)
+                (m_tail - 1)->iov_base
--