diff --git a/edge_utils.c b/edge_utils.c
index 2972489..f678ca7 100644
--- a/edge_utils.c
+++ b/edge_utils.c
@@ -1274,13 +1274,13 @@ static void readFromTAPSocket(n2n_edge_t * eee) {
 /* ************************************** */
 
 #ifdef WIN32
-static DWORD tunReadThread(LPVOID lpArg) {
+static DWORD* tunReadThread(LPVOID lpArg) {
   n2n_edge_t *eee = (n2n_edge_t*)lpArg;
 
   while(1)
     readFromTAPSocket(eee);
 
-  return((DWORD)NULL);
+  return((DWORD*)NULL);
 }
 
 /* ************************************** */
@@ -1704,14 +1704,14 @@ static int edge_init_sockets(n2n_edge_t *eee, int udp_local_port, int mgmt_port)
     u_int enable_reuse = 1;
     
     /* allow multiple sockets to use the same PORT number */
-    setsockopt(eee->udp_multicast_sock, SOL_SOCKET, SO_REUSEADDR, &enable_reuse, sizeof(enable_reuse));
+    setsockopt(eee->udp_multicast_sock, SOL_SOCKET, SO_REUSEADDR, (char *)&enable_reuse, sizeof(enable_reuse));
 #ifdef SO_REUSEPORT /* no SO_REUSEPORT in Windows / old linux versions */
     setsockopt(eee->udp_multicast_sock, SOL_SOCKET, SO_REUSEPORT, &enable_reuse, sizeof(enable_reuse));
 #endif
 
     mreq.imr_multiaddr.s_addr = inet_addr(N2N_MULTICAST_GROUP);
     mreq.imr_interface.s_addr = htonl(INADDR_ANY);
-    if (setsockopt(eee->udp_multicast_sock, IPPROTO_IP, IP_ADD_MEMBERSHIP, &mreq, sizeof(mreq)) < 0) {
+    if (setsockopt(eee->udp_multicast_sock, IPPROTO_IP, IP_ADD_MEMBERSHIP, (char *)&mreq, sizeof(mreq)) < 0) {
       traceEvent(TRACE_ERROR, "Failed to bind to local multicast group %s:%u [errno %u]",
 		 N2N_MULTICAST_GROUP, N2N_MULTICAST_PORT, errno);
 
diff --git a/sn.c b/sn.c
index 094f4dd..3e46c04 100644
--- a/sn.c
+++ b/sn.c
@@ -407,7 +407,7 @@ static int load_allowed_n2n_communities(char *path) {
   char buffer[4096], *line;
   FILE *fd = fopen(path, "r");
   struct n2n_allowed_communities *s, *tmp;
-  u_int32_t num_communities = 0;
+  uint32_t num_communities = 0;
   
   if(fd == NULL) {
     traceEvent(TRACE_WARNING, "File %s not found", path);
diff --git a/win32/n2n_win32.h b/win32/n2n_win32.h
index 073aebc..64bff4a 100644
--- a/win32/n2n_win32.h
+++ b/win32/n2n_win32.h
@@ -13,7 +13,9 @@
 
 #if defined(__MINGW32__)
 /* should be defined here and before winsock gets included */
+#ifndef _WIN32_WINNT
 #define _WIN32_WINNT 0x501 //Otherwise the linker doesnt find getaddrinfo
+#endif /* #ifndef _WIN32_WINNT */
 #include <inttypes.h>
 #endif /* #if defined(__MINGW32__) */