diff -u -r ../mtr-66de3ecbab28b054b868a73fbb57f30549d770ac/net.h ./net.h --- ../mtr-66de3ecbab28b054b868a73fbb57f30549d770ac/net.h 2016-05-03 05:01:11.000000000 -0400 +++ ./net.h 2016-06-21 10:03:22.706030491 -0400 @@ -21,6 +21,7 @@ #include <arpa/inet.h> #include <netinet/in.h> #include <sys/socket.h> +#include <sys/select.h> #ifdef ENABLE_IPV6 #include <netinet/ip6.h> #include <netinet/icmp6.h>