--- trunk/src/optimization/LineSearch.cpp	2012/08/22 02:28:28	1782
+++ trunk/src/optimization/LineSearch.cpp	2012/08/29 20:17:07	1788
@@ -21,6 +21,7 @@
 #include "optimization/Problem.hpp"
 #include "optimization/Constraint.hpp"
 #include "utils/simError.h"
+#include <cstdio>
 
 namespace QuantLib {