diff --git a/dune/solvers/solvers/quadraticipopt.hh b/dune/solvers/solvers/quadraticipopt.hh
index 54a49cb5cbb63141ee50016cf33f42367ce715e4..ba06aa1730dc99f870d25d17455f08cafd2ac8da 100644
--- a/dune/solvers/solvers/quadraticipopt.hh
+++ b/dune/solvers/solvers/quadraticipopt.hh
@@ -648,6 +648,7 @@ public:
 
     /** \brief Default constructor */
     QuadraticIPOptSolver () : LinearSolver<MatrixType,VectorType>(NumProc::FULL),
+                              tolerance_(1e-8), maxIterations_(100),
                               hessian_(NULL), rhs_(NULL),
                               obstacles_(NULL),
                               linearSolverType_(""),