--- a/lwip-v6/src/include/lwip/sockets.h
+++ b/lwip-v6/src/include/lwip/sockets.h
@@ -58,6 +58,7 @@
#include <netinet/in.h>
#include <sys/ioctl.h>
#include <net/if_arp.h>
+#include <linux/sockios.h>
#include "lwip/ip_addr.h"
#if 0