diff --git a/simulation/simple_sensor_simulator/include/simple_sensor_simulator/vehicle_simulation/ego_entity_simulation.hpp b/simulation/simple_sensor_simulator/include/simple_sensor_simulator/vehicle_simulation/ego_entity_simulation.hpp
index 625a595ebd7..4cc63686d8c 100644
--- a/simulation/simple_sensor_simulator/include/simple_sensor_simulator/vehicle_simulation/ego_entity_simulation.hpp
+++ b/simulation/simple_sensor_simulator/include/simple_sensor_simulator/vehicle_simulation/ego_entity_simulation.hpp
@@ -60,6 +60,8 @@ class EgoEntitySimulation
 
   traffic_simulator_msgs::msg::EntityStatus status_;
 
+  bool consider_road_slope_ = false;
+
 public:
   const std::shared_ptr<hdmap_utils::HdMapUtils> hdmap_utils_ptr_;
 
diff --git a/simulation/simple_sensor_simulator/src/vehicle_simulation/ego_entity_simulation.cpp b/simulation/simple_sensor_simulator/src/vehicle_simulation/ego_entity_simulation.cpp
index 3743e5002da..628416da5a9 100644
--- a/simulation/simple_sensor_simulator/src/vehicle_simulation/ego_entity_simulation.cpp
+++ b/simulation/simple_sensor_simulator/src/vehicle_simulation/ego_entity_simulation.cpp
@@ -38,7 +38,8 @@ EgoEntitySimulation::EgoEntitySimulation(
 : autoware(std::make_unique<concealer::AutowareUniverse>()),
   vehicle_model_type_(getVehicleModelType()),
   vehicle_model_ptr_(makeSimulationModel(vehicle_model_type_, step_time, parameters)),
-  hdmap_utils_ptr_(hdmap_utils)
+  hdmap_utils_ptr_(hdmap_utils),
+  consider_road_slope_(getParameter<bool>("consider_road_slope", false))
 {
 }