diff -ur chuck-1.2.1.2.orig/src/util_string.h chuck-1.2.1.2/src/util_string.h
--- chuck-1.2.1.2.orig/src/util_string.h	2008-07-16 12:55:17.000000000 +0300
+++ chuck-1.2.1.2/src/util_string.h	2009-06-01 21:33:59.000000000 +0300
@@ -33,6 +33,8 @@
 #ifndef __UTIL_STRING_H__
 #define __UTIL_STRING_H__
 
+#include <cstdio>
+
 #include "chuck_def.h"
 #include <string>
 #include <vector>