diff --git a/toxcore/network.c b/toxcore/network.c
index 49e1726c..af9e8cdd 100644
--- a/toxcore/network.c
+++ b/toxcore/network.c
@@ -28,6 +28,10 @@
 #include "network.h"
 #include "util.h"
 
+#ifndef IPV6_V6ONLY
+#define IPV6_V6ONLY 27
+#endif
+
 /*  return current UNIX time in microseconds (us). */
 uint64_t current_time(void)
 {
@@ -407,7 +411,7 @@ Networking_Core *new_networking(IP ip, uint16_t port)
 #ifdef LOGGING
         res =
 #endif
-            setsockopt(temp->sock, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP, &mreq, sizeof(mreq));
+            setsockopt(temp->sock, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP, (char*)&mreq, sizeof(mreq));
 #ifdef LOGGING
 
         if (res < 0) {
diff --git a/toxcore/network.h b/toxcore/network.h
index 4432baed..f6256ab4 100644
--- a/toxcore/network.h
+++ b/toxcore/network.h
@@ -40,6 +40,15 @@
 #include <ws2tcpip.h>
 
 typedef unsigned int sock_t;
+typedef unsigned int sa_family_t;
+
+#ifndef IN6_ARE_ADDR_EQUAL
+#define IN6_ARE_ADDR_EQUAL(a,b) \
+    ((((__const uint32_t *) (a))[0] == ((__const uint32_t *) (b))[0]) \
+  && (((__const uint32_t *) (a))[1] == ((__const uint32_t *) (b))[1]) \
+  && (((__const uint32_t *) (a))[2] == ((__const uint32_t *) (b))[2]) \
+  && (((__const uint32_t *) (a))[3] == ((__const uint32_t *) (b))[3]))
+#endif
 
 #else // Linux includes