--- third-party/miniupnp/miniupnpc.c
+++ third-party/miniupnp/miniupnpc.c
@@ -415,11 +415,12 @@
 	/* reception */
 	memset(&sockudp_r, 0, sizeof(struct sockaddr_storage));
 	if(ipv6) {
+		static const struct in6_addr my_in6addr_any = IN6ADDR_ANY_INIT;
 		struct sockaddr_in6 * p = (struct sockaddr_in6 *)&sockudp_r;
 		p->sin6_family = AF_INET6;
 		if(sameport)
 			p->sin6_port = htons(PORT);
-		p->sin6_addr = in6addr_any; /* in6addr_any is not available with MinGW32 3.4.2 */
+		p->sin6_addr = my_in6addr_any; /* in6addr_any is not available with MinGW32 3.4.2 */
 	} else {
 		struct sockaddr_in * p = (struct sockaddr_in *)&sockudp_r;
 		p->sin_family = AF_INET;