diff --git a/ProcessLib/LIE/HydroMechanics/CreateHydroMechanicsProcess.cpp b/ProcessLib/LIE/HydroMechanics/CreateHydroMechanicsProcess.cpp
index b0d4873ef31ba60009ce164ad03408df4441b078..268d9f20b234052a78b069f0221e747d4af1196c 100644
--- a/ProcessLib/LIE/HydroMechanics/CreateHydroMechanicsProcess.cpp
+++ b/ProcessLib/LIE/HydroMechanics/CreateHydroMechanicsProcess.cpp
@@ -213,9 +213,7 @@ std::unique_ptr<Process> createHydroMechanicsProcess(
         auto& fracture_properties_config = *opt_fracture_properties_config;
 
         frac_prop = std::make_unique<ProcessLib::LIE::FractureProperty>(
-            0 /*fracture_id*/,
-            //! \ogs_file_param{prj__processes__process__HYDRO_MECHANICS_WITH_LIE__fracture_properties__material_id}
-            fracture_properties_config.getConfigParameter<int>("material_id"),
+            0 /*fracture_id*/, 0 /*material_id*/,
             ParameterLib::findParameter<double>(
                 //! \ogs_file_param_special{prj__processes__process__HYDRO_MECHANICS_WITH_LIE__fracture_properties__initial_aperture}
                 fracture_properties_config, "initial_aperture", parameters, 1,
@@ -257,12 +255,6 @@ std::unique_ptr<Process> createHydroMechanicsProcess(
     if (deactivate_matrix_in_flow)
         INFO("Deactivate matrix elements in flow calculation.");
 
-    // Reference temperature
-    const auto& reference_temperature =
-        //! \ogs_file_param{prj__processes__process__HYDRO_MECHANICS_WITH_LIE__reference_temperature}
-        config.getConfigParameter<double>(
-            "reference_temperature", std::numeric_limits<double>::quiet_NaN());
-
     //! \ogs_file_param{prj__processes__process__HYDRO_MECHANICS_WITH_LIE__use_b_bar}
     auto const use_b_bar = config.getConfigParameter<bool>("use_b_bar", false);
 
@@ -311,17 +303,11 @@ std::unique_ptr<Process> createHydroMechanicsProcess(
     }
 
     HydroMechanicsProcessData<GlobalDim> process_data{
-        materialIDs(mesh),
-        std::move(solid_constitutive_relations),
-        std::move(media_map),
-        specific_body_force,
-        std::move(fracture_model),
-        std::move(frac_prop),
-        initial_effective_stress,
-        initial_fracture_effective_stress,
-        deactivate_matrix_in_flow,
-        reference_temperature,
-        use_b_bar};
+        materialIDs(mesh),         std::move(solid_constitutive_relations),
+        std::move(media_map),      specific_body_force,
+        std::move(fracture_model), std::move(frac_prop),
+        initial_effective_stress,  initial_fracture_effective_stress,
+        deactivate_matrix_in_flow, use_b_bar};
 
     SecondaryVariableCollection secondary_variables;
 
diff --git a/ProcessLib/LIE/HydroMechanics/HydroMechanicsProcessData.h b/ProcessLib/LIE/HydroMechanics/HydroMechanicsProcessData.h
index 71b3e07906de449b4dc65577cb3b632c4264ef93..dfb508d267ab394874bdcb2b3f9e5cd31afbbb80 100644
--- a/ProcessLib/LIE/HydroMechanics/HydroMechanicsProcessData.h
+++ b/ProcessLib/LIE/HydroMechanics/HydroMechanicsProcessData.h
@@ -51,8 +51,6 @@ struct HydroMechanicsProcessData
 
     bool const deactivate_matrix_in_flow;
 
-    double const reference_temperature;
-
     /// An indicator to use the B bar method \cite hughes1980generalization to
     /// tackle the  volumetric locking.
     const bool use_b_bar;
diff --git a/ProcessLib/LIE/HydroMechanics/LocalAssembler/HydroMechanicsLocalAssemblerMatrix-impl.h b/ProcessLib/LIE/HydroMechanics/LocalAssembler/HydroMechanicsLocalAssemblerMatrix-impl.h
index 10f0efc65ed4949c8ad626748ffdf345c62fa844..8d977b1d6b1e834f9563204e9cfdf0606c6706cd 100644
--- a/ProcessLib/LIE/HydroMechanics/LocalAssembler/HydroMechanicsLocalAssemblerMatrix-impl.h
+++ b/ProcessLib/LIE/HydroMechanics/LocalAssembler/HydroMechanicsLocalAssemblerMatrix-impl.h
@@ -448,7 +448,6 @@ void HydroMechanicsLocalAssemblerMatrix<ShapeFunctionDisplacement,
         variables_prev.mechanical_strain
             .emplace<MathLib::KelvinVector::KelvinVectorType<GlobalDim>>(
                 eps_prev);
-        variables_prev.temperature = _process_data.reference_temperature;
 
         auto&& solution = _ip_data[ip].solid_material.integrateStress(
             variables_prev, variables, t, x_position, dt, *state);