diff --git a/dune/tectonic/myblockproblem.hh b/dune/tectonic/myblockproblem.hh
index 48be6f835ad9b17f4019bfeef3521f9fed65d469..6e43c2b12d4392e7e7a670148fb49faf064619d4 100644
--- a/dune/tectonic/myblockproblem.hh
+++ b/dune/tectonic/myblockproblem.hh
@@ -95,7 +95,7 @@ template <class MyConvexProblemTypeTEMPLATE> class MyBlockProblem {
 
     int bisectionsteps = 0;
     Bisection bisection(0.0, 1.0, 1e-12, true, 0);            // TODO
-    return bisection.minimize(psi, 0.0, 0.0, bisectionsteps); // TODO
+    return bisection.minimize(psi, 1.0, 0.0, bisectionsteps); // TODO
   }
 
   void assembleTruncate(VectorType const &u, Linearization &linearization,