* Add missing header

src/drivers/po_hi_driver_sockets.c

@@ -44,6 +44,7 @@
 #include <sys/select.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
+#include <netinet/tcp.h>
 #include <arpa/inet.h>
 #include <sys/time.h>
 #endif