Only use MSG_NOSIGNAL for !win32 since it doesn't exist on windows.
diff --git a/util.c b/util.c
index bcf9349..66ae810 100644
--- a/util.c
+++ b/util.c
@@ -958,7 +958,11 @@ static enum send_ret __stratum_send(struct pool *pool, char *s, ssize_t len)
FD_SET(sock, &wd);
if (select(sock + 1, NULL, &wd, NULL, &timeout) < 1)
return SEND_SELECTFAIL;
+#ifndef WIN32
sent = send(pool->sock, s + ssent, len, MSG_NOSIGNAL);
+#else
+ sent = send(pool->sock, s + ssent, len, 0);
+#endif
if (sent < 0) {
if (!sock_blocks())
return SEND_SENDFAIL;