diff --git a/Testing/Code/Radiometry/otbTestVNLMinimize.cxx b/Testing/Code/Radiometry/otbTestVNLMinimize.cxx
index 0dbe9db068fa3340b49343a48095420e13071aec..322cf5019e71b9fc1cdf940680ab320050c43259 100644
--- a/Testing/Code/Radiometry/otbTestVNLMinimize.cxx
+++ b/Testing/Code/Radiometry/otbTestVNLMinimize.cxx
@@ -15,11 +15,12 @@
   PURPOSE.  See the above copyright notices for more information.
 
 =========================================================================*/
+#include <cstdlib>
+#include <iostream>
 
 #include <vnl/algo/vnl_lsqr.h>
 #include <vnl/vnl_sparse_matrix_linear_system.h>
 #include <vnl/vnl_least_squares_function.h>
-#include <iostream>
 
 int otbTestVNLMinimize(int argc, char * argv[])
 {