diff --git a/Solver_interface/include/CGAL/Eigen_solver_traits.h b/Solver_interface/include/CGAL/Eigen_solver_traits.h
index c09aba99ac0..fe37ea3b2d2 100644
--- a/Solver_interface/include/CGAL/Eigen_solver_traits.h
+++ b/Solver_interface/include/CGAL/Eigen_solver_traits.h
@@ -110,8 +110,8 @@ public:
     return solver().info() == Eigen::Success;
   }
 protected:
-  boost::shared_ptr<EigenSolverT> m_solver_sptr;
   const typename Matrix::EigenType* m_mat;
+  boost::shared_ptr<EigenSolverT> m_solver_sptr;
 
 };