*** ./src/bwping.c.ORIG	Mon Jul 15 19:27:51 2019
--- ./src/bwping.c	Mon Jul 15 19:28:09 2019
***************
*** 229,234 ****
--- 229,238 ----
      (*transmitted_volume) += pkt_size;
  }
  
+ #ifndef MSG_DONTWAIT
+ #define MSG_DONTWAIT MSG_NONBLOCK
+ #endif
+ 
  static bool recv_ping4(int sock, uint16_t ident, uint32_t *received_number, uint64_t *received_volume)
  {
      size_t             hdr_len;