diff --git a/pybamm/models/full_battery_models/base_battery_model.py b/pybamm/models/full_battery_models/base_battery_model.py
index 79a9aa8341..851c5def82 100644
--- a/pybamm/models/full_battery_models/base_battery_model.py
+++ b/pybamm/models/full_battery_models/base_battery_model.py
@@ -564,8 +564,8 @@ def set_thermal_submodel(self):
 
         elif self.options["thermal"] == "x-lumped":
             if self.options["dimensionality"] == 0:
-                # With 0D current collectors x-lumped is equivalent to lumped
-                thermal_submodel = pybamm.thermal.Lumped(self.param)
+                # With 0D current collectors x-lumped is equivalent to lumped pouch
+                thermal_submodel = pybamm.thermal.Lumped(self.param, geometry="pouch")
             elif self.options["dimensionality"] == 1:
                 thermal_submodel = pybamm.thermal.pouch_cell.CurrentCollector1D(
                     self.param