--- conntrack-tools-1.4.2.orig/include/udp.h	2013-02-24 23:23:57.000000000 +0100
+++ conntrack-tools-1.4.2/include/udp.h	2014-04-05 09:38:04.015383617 +0200
@@ -2,6 +2,7 @@
 #define _UDP_H_
 
 #include <stdint.h>
+#include <sys/select.h>
 #include <netinet/in.h>
 
 struct udp_conf {