diff --git a/dune/tectonic/myblockproblem.hh b/dune/tectonic/myblockproblem.hh
index de1d51304a7515b90f8c66bd33bbaa874e7560b1..1f569b48356b0d209a7bf89aba14c3652edf26c9 100644
--- a/dune/tectonic/myblockproblem.hh
+++ b/dune/tectonic/myblockproblem.hh
@@ -70,7 +70,7 @@ template <class MyConvexProblemTypeTEMPLATE> class MyBlockProblem {
     bisection = Bisection(
         0.0, // acceptError: Stop if the search interval has
              // become smaller than this number
-        1.0, // acceptFactor: ?
+        parset.get<double>("bisection.acceptFactor"),
         parset.get<double>("bisection.requiredResidual"), true, // fastQuadratic
         0); // safety: acceptance factor for inexact minimization
   }
diff --git a/src/one-body-sample.parset b/src/one-body-sample.parset
index 14885fb9f22cfa917f23387a7b41d946e8fb53c7..7a516d95556ee33c6e8370cae9ffa31138a95f63 100644
--- a/src/one-body-sample.parset
+++ b/src/one-body-sample.parset
@@ -61,6 +61,7 @@ nu2 = 1
 steps = 1
 
 [bisection]
+acceptFactor = 1.0
 requiredResidual = 1e-12
 
 [boundary.friction]