diff --git a/homework3/starting_point/material_points_factory.cc b/homework3/starting_point/material_points_factory.cc
index 6251fe4..f44e30d 100644
--- a/homework3/starting_point/material_points_factory.cc
+++ b/homework3/starting_point/material_points_factory.cc
@@ -1,47 +1,47 @@
 #include "material_points_factory.hh"
 #include "compute_temperature.hh"
 #include "csv_reader.hh"
 #include "csv_writer.hh"
 #include "material_point.hh"
 #include <cmath>
 #include <iostream>
 /* -------------------------------------------------------------------------- */
 
 std::unique_ptr<Particle> MaterialPointsFactory::createParticle() {
   return std::make_unique<MaterialPoint>();
 }
 
 /* -------------------------------------------------------------------------- */
 
 SystemEvolution&
 MaterialPointsFactory::createSimulation(const std::string& fname,
                                         Real timestep) {
 
   this->system_evolution =
       std::make_unique<SystemEvolution>(std::make_unique<System>());
 
   CsvReader reader(fname);
   reader.read(this->system_evolution->getSystem());
 
   // check if it is a square number
   auto N = this->system_evolution->getSystem().getNbParticles();
   int side = std::sqrt(N);
   if (side * side != N)
     throw std::runtime_error("number of particles is not square");
 
-  auto temperature = std::make_shared<ComputeTemperature>();
+  auto temperature = std::make_shared<ComputeTemperature>(timestep);
   this->system_evolution->addCompute(temperature);
 
   return *system_evolution;
 }
 
 /* -------------------------------------------------------------------------- */
 
 ParticlesFactoryInterface& MaterialPointsFactory::getInstance() {
   if (not ParticlesFactoryInterface::factory)
     ParticlesFactoryInterface::factory = new MaterialPointsFactory;
 
   return *factory;
 }
 
 /* -------------------------------------------------------------------------- */