diff --git a/polyp/inet_ntop.h b/polyp/inet_ntop.h
index 11bc6112e..7fb67b442 100644
--- a/polyp/inet_ntop.h
+++ b/polyp/inet_ntop.h
@@ -1,6 +1,12 @@
 #ifndef fooinet_ntophfoo
 #define fooinet_ntophfoo
 
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+
+#include "winsock.h"
+
 const char *inet_ntop(int af, const void *src, char *dst, socklen_t cnt);
 
 #endif