Index: foma/flookup.c
--- foma/flookup.c.orig
+++ foma/flookup.c
@@ -21,6 +21,7 @@
 #include <limits.h>
 #include <getopt.h>
 #include <unistd.h>
+#include <netinet/in.h>
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <arpa/inet.h>