--- flex-2.6.4/src/tables.c.orig	Thu Jan 23 22:22:14 2020
+++ flex-2.6.4/src/tables.c	Thu Jan 23 22:22:27 2020
@@ -33,6 +33,8 @@
  */
 
 
+#include <arpa/inet.h>
+
 #include "flexdef.h"
 #include "tables.h"