diff --git a/hub/city_model_structure/energy_systems/energy_system.py b/hub/city_model_structure/energy_systems/energy_system.py
index 5121b95c..d3a21f00 100644
--- a/hub/city_model_structure/energy_systems/energy_system.py
+++ b/hub/city_model_structure/energy_systems/energy_system.py
@@ -9,7 +9,6 @@ from typing import Union, List
 from pathlib import Path
 
 from hub.city_model_structure.energy_systems.distribution_system import DistributionSystem
-from hub.city_model_structure.energy_systems.generation_system import GenerationSystem
 from hub.city_model_structure.energy_systems.non_pv_generation_system import NonPvGenerationSystem
 from hub.city_model_structure.energy_systems.pv_generation_system import PvGenerationSystem
 from hub.city_model_structure.energy_systems.control_system import ControlSystem