--- trunk/src/optimization/Constraint.cpp	2012/08/29 18:13:11	1787
+++ trunk/src/optimization/Constraint.cpp	2012/08/29 20:17:07	1788
@@ -19,6 +19,7 @@
 
 #include "optimization/Constraint.hpp"
 #include "utils/simError.h"
+#include <cstdio>
 
 namespace QuantLib {