diff --git a/network_win32.cpp b/network_win32.cpp
index d364611..5a45ce5 100644
--- a/network_win32.cpp
+++ b/network_win32.cpp
@@ -987,7 +987,7 @@ DWORD SetMetricOnNetworkAdapter(NET_LUID *InterfaceLuid, ADDRESS_FAMILY family,
 static const char *PrintIPV6(const uint8 new_address[16]) {
   sockaddr_in6 sin6 = {0};
   static char buf[100];
-  if (!inet_ntop(PF_INET6, new_address, buf, 100))
+  if (!inet_ntop(PF_INET6, (void*)new_address, buf, 100))
     memcpy(buf, "unknown", 8);
   return buf;
 }
diff --git a/wireguard_config.cpp b/wireguard_config.cpp
index dbc67b0..974f768 100644
--- a/wireguard_config.cpp
+++ b/wireguard_config.cpp
@@ -25,7 +25,8 @@
 #endif
 
 const char *print_ip_prefix(char buf[kSizeOfAddress], int family, const void *ip, int prefixlen) {
-  if (!inet_ntop(family, ip, buf, kSizeOfAddress - 8)) {
+  // cast to void* to work on VS2015
+  if (!inet_ntop(family, (void*)ip, buf, kSizeOfAddress - 8)) {
     memcpy(buf, "unknown", 8);
   }
   if (prefixlen >= 0)