diff --git a/pybamm/models/submodels/electrolyte_conductivity/integrated_conductivity.py b/pybamm/models/submodels/electrolyte_conductivity/integrated_conductivity.py
index 60d8a1ccd7..6c19214d20 100644
--- a/pybamm/models/submodels/electrolyte_conductivity/integrated_conductivity.py
+++ b/pybamm/models/submodels/electrolyte_conductivity/integrated_conductivity.py
@@ -138,6 +138,10 @@ def get_coupled_variables(self, variables):
             - integral_p
         )
 
+        # phi_e_n = 0 * phi_e_n
+        # phi_e_s = 0 * phi_e_s
+        # phi_e_p = 0 * phi_e_p
+
         # concentration overpotential
         eta_c_av = (
             chi_av