diff --git a/geojson_modelica_translator/model_connectors/networks/templates/NetworkAmbientWaterStub_Instance.mopt b/geojson_modelica_translator/model_connectors/networks/templates/NetworkAmbientWaterStub_Instance.mopt
index c56033470..b4376d668 100644
--- a/geojson_modelica_translator/model_connectors/networks/templates/NetworkAmbientWaterStub_Instance.mopt
+++ b/geojson_modelica_translator/model_connectors/networks/templates/NetworkAmbientWaterStub_Instance.mopt
@@ -3,11 +3,12 @@
   {% for building in range( sys_params.num_buildings ) %}
   Buildings.Fluid.Sources.MassFlowSource_T supHeaWat_{{ building + 1 }}(
     redeclare package Medium={{ globals.medium_w }},
-    use_m_flow_in=true,
     use_T_in=false,
     {% if 'ghe_parameters' in sys_params.district_system['fifth_generation'] %}
+    use_m_flow_in=false,
     T={{ sys_params.district_system.fifth_generation.ghe_parameters.soil.undisturbed_temp }}+273.15,
     {% else %}
+    use_m_flow_in=true,
     T={{ sys_params.district_system.fifth_generation.central_heating_plant_parameters.temp_setpoint_hhw }}+273.15,
     {% endif %}
     nPorts=1)