--- ./ifconfig.c	2017-02-21 23:54:32.000000000 +0530
+++ ../ifconfig.c	2017-04-09 14:12:07.253003297 +0530
@@ -44,6 +44,7 @@
 #include <string.h>
 #include <unistd.h>
 #include <netdb.h>
+#include <arpa/inet.h>
 
 /* Ugh.  But libc5 doesn't provide POSIX types.  */
 #include <asm/types.h>
