diff --git a/src/assemblers.cc b/src/assemblers.cc
index b027e72fa91258ad4c06b05d7a1e63a0bf659a95..347a84810723766feac0b19afd46966b886a9eeb 100644
--- a/src/assemblers.cc
+++ b/src/assemblers.cc
@@ -57,7 +57,7 @@ Dune::shared_ptr<Dune::GlobalNonlinearity<MatrixType, VectorType> const>
 assemble_nonlinearity(
     Dune::ParameterTree const &parset,
     Dune::BlockVector<Dune::FieldVector<double, 1>> const &nodalIntegrals,
-    Dune::BlockVector<Dune::FieldVector<double, 1>> const &state, double tau) {
+    Dune::BlockVector<Dune::FieldVector<double, 1>> const &state) {
   auto const size = nodalIntegrals.size();
 
   typedef Dune::BlockVector<Dune::FieldVector<double, 1>> SingletonVectorType;
diff --git a/src/assemblers.hh b/src/assemblers.hh
index 58a9d780902a763c8becce9eeb4767d7fb25538d..e5d8b316bbfa75b8610ed0e8af6e24547c5540d5 100644
--- a/src/assemblers.hh
+++ b/src/assemblers.hh
@@ -27,6 +27,6 @@ Dune::shared_ptr<Dune::GlobalNonlinearity<MatrixType, VectorType> const>
 assemble_nonlinearity(
     Dune::ParameterTree const &parset,
     Dune::BlockVector<Dune::FieldVector<double, 1>> const &nodalIntegrals,
-    Dune::BlockVector<Dune::FieldVector<double, 1>> const &state, double h);
+    Dune::BlockVector<Dune::FieldVector<double, 1>> const &state);
 
 #endif
diff --git a/src/assemblers_tmpl.cc b/src/assemblers_tmpl.cc
index 805ee78ce10a097c6c2f145a15ecb4c57caa3b72..af3ff384ad23ea04e1333fc07ae44033883cb21b 100644
--- a/src/assemblers_tmpl.cc
+++ b/src/assemblers_tmpl.cc
@@ -32,4 +32,4 @@ template Dune::shared_ptr<
 assemble_nonlinearity<MatrixType, VectorType>(
     Dune::ParameterTree const &parset,
     Dune::BlockVector<Dune::FieldVector<double, 1>> const &nodalIntegrals,
-    Dune::BlockVector<Dune::FieldVector<double, 1>> const &state, double tau);
+    Dune::BlockVector<Dune::FieldVector<double, 1>> const &state);
diff --git a/src/one-body-sample.cc b/src/one-body-sample.cc
index 10341f0b15b8145b617bdcc9288bb4ec3668a0f9..d688d45d8ac1a8985ae74cb444f0e56da3ad3ae3 100644
--- a/src/one-body-sample.cc
+++ b/src/one-body-sample.cc
@@ -352,7 +352,7 @@ int main(int argc, char *argv[]) {
         for (size_t state_fpi = 1; state_fpi <= state_fpi_max; ++state_fpi) {
           auto myGlobalNonlinearity =
               assemble_nonlinearity<MatrixType, VectorType>(
-                  parset.sub("boundary.friction"), *nodalIntegrals, alpha, tau);
+                  parset.sub("boundary.friction"), *nodalIntegrals, alpha);
 
           MyConvexProblemType const myConvexProblem(
               problem_A, *myGlobalNonlinearity, problem_rhs);