diff -ur wmmsens-0.29.8.orig/src/main.c wmmsens-0.29.8/src/main.c
--- wmmsens-0.29.8.orig/src/main.c	2005-07-05 01:18:21.000000000 +0300
+++ wmmsens-0.29.8/src/main.c	2009-07-25 22:45:56.000000000 +0300
@@ -119,6 +119,7 @@
 //
 //
 
+#include <cstdlib>
 #include <iostream>
 #include <iomanip>
 #include <fstream>