diff --git a/pybamm/parameters/lithium_ion_parameters.py b/pybamm/parameters/lithium_ion_parameters.py
index 518db44fb5..9afcad0b46 100644
--- a/pybamm/parameters/lithium_ion_parameters.py
+++ b/pybamm/parameters/lithium_ion_parameters.py
@@ -307,9 +307,7 @@ def _set_parameters(self):
             f"{Domain} electrode reference concentration for free of deformation "
             "[mol.m-3]"
         )
-        # self.Omega = pybamm.Parameter(
-        #    f"{Domain} electrode partial molar volume [m3.mol-1]"
-        # )
+
         self.l_cr_0 = pybamm.Parameter(f"{Domain} electrode initial crack length [m]")
         self.w_cr = pybamm.Parameter(f"{Domain} electrode initial crack width [m]")
         self.rho_cr = pybamm.Parameter(