diff -up iptstate-2.2.1/iptstate.cc.strerror iptstate-2.2.1/iptstate.cc
--- iptstate-2.2.1/iptstate.cc.strerror	2008-02-25 11:35:52.000000000 +0100
+++ iptstate-2.2.1/iptstate.cc	2008-02-25 11:35:04.000000000 +0100
@@ -42,6 +42,7 @@
 
 #include <iostream>
 #include <string>
+#include <cstring>
 #include <vector>
 #include <fstream>
 #include <sstream>