diff -Nurpa erec-2.2.0.1.orig/argh/argh.cc erec-2.2.0.1/argh/argh.cc
--- erec-2.2.0.1.orig/argh/argh.cc	2008-12-17 03:48:35.000000000 +0300
+++ erec-2.2.0.1/argh/argh.cc	2008-12-17 03:49:19.000000000 +0300
@@ -1,6 +1,7 @@
 #include <map>
 #include <cstdio>
 #include <cstring>
+#include <cstdlib>
 
 using std::strchr;
 using std::sprintf;