diff --git a/dune/solvers/solvers/quadraticipopt.hh b/dune/solvers/solvers/quadraticipopt.hh
index 295364302d1b15ba072e5f98a997eee577574c10..de2cb1d922c19a94bd00934fc122080e7f354e3c 100644
--- a/dune/solvers/solvers/quadraticipopt.hh
+++ b/dune/solvers/solvers/quadraticipopt.hh
@@ -657,7 +657,7 @@ public:
         : IterativeSolver<VectorType>(1e-8, 100, verbosity),
           hessian_(&hessian), rhs_(&rhs), obstacles_(NULL),
           linearSolverType_(linearSolverType),
-          constraintMatrix_(nullptr),constraintObstacles_(nullptr)
+          constraintObstacles_(nullptr),constraintMatrix_(nullptr)
     {
         this->x_ = &x;
     }