diff --git a/dune/tectonic/myblockproblem.hh b/dune/tectonic/myblockproblem.hh
index b8723b13a763920f361acfbaa599d1d45fc557ee..6d11407c8dbe2cd88254052c581ff0c468794b2e 100644
--- a/dune/tectonic/myblockproblem.hh
+++ b/dune/tectonic/myblockproblem.hh
@@ -57,8 +57,7 @@ class MyBlockProblem : /* NOT PUBLIC */ BlockNonlinearGSProblem<ConvexProblem> {
   MyBlockProblem(Dune::ParameterTree const &parset, ConvexProblem &problem)
       : BNGSP(parset, problem),
         parset_(parset),
-        localBisection() // TODO
-  {}
+        localBisection(0.0, 1.0, 1e-12, false) {}
 
   std::string getOutput(bool header = false) const {
     if (header) {