diff --git a/pybamm/input/parameters/lithium_ion/negative_electrodes/graphite_ORegan2021/graphite_LGM50_diffusivity_ORegan2021.py b/pybamm/input/parameters/lithium_ion/negative_electrodes/graphite_ORegan2021/graphite_LGM50_diffusivity_ORegan2021.py
index 7fa5670dcb..b8b61686b7 100644
--- a/pybamm/input/parameters/lithium_ion/negative_electrodes/graphite_ORegan2021/graphite_LGM50_diffusivity_ORegan2021.py
+++ b/pybamm/input/parameters/lithium_ion/negative_electrodes/graphite_ORegan2021/graphite_LGM50_diffusivity_ORegan2021.py
@@ -52,7 +52,7 @@ def graphite_LGM50_diffusivity_ORegan2021(sto, T):
             + a3 * exp(-((sto - b3) ** 2) / c3)
             + a4 * exp(-((sto - b4) ** 2) / c4)
         )
-        * 3
+        * 3.0321  # correcting factor (see O'Regan et al 2021)
     )
 
     E_D_s = d * constants.R
diff --git a/pybamm/input/parameters/lithium_ion/negative_electrodes/graphite_ORegan2021/graphite_LGM50_entropic_change_ORegan2021.py b/pybamm/input/parameters/lithium_ion/negative_electrodes/graphite_ORegan2021/graphite_LGM50_entropic_change_ORegan2021.py
index 66d18a12d2..44791e38d5 100644
--- a/pybamm/input/parameters/lithium_ion/negative_electrodes/graphite_ORegan2021/graphite_LGM50_entropic_change_ORegan2021.py
+++ b/pybamm/input/parameters/lithium_ion/negative_electrodes/graphite_ORegan2021/graphite_LGM50_entropic_change_ORegan2021.py
@@ -22,7 +22,7 @@ def graphite_LGM50_entropic_change_ORegan2021(sto):
     """
 
     a0 = -0.1112
-    a1 = -0.09002 * 0   # fixed fit (see discussion on paper)
+    a1 = -0.09002 * 0   # fixed fit (see discussion O'Regan et al 2021)
     a2 = 0.3561
     b1 = 0.4955
     b2 = 0.08309
diff --git a/pybamm/input/parameters/lithium_ion/negative_electrodes/graphite_ORegan2021/parameters.csv b/pybamm/input/parameters/lithium_ion/negative_electrodes/graphite_ORegan2021/parameters.csv
index f8c41d7265..a71e5d0ecd 100644
--- a/pybamm/input/parameters/lithium_ion/negative_electrodes/graphite_ORegan2021/parameters.csv
+++ b/pybamm/input/parameters/lithium_ion/negative_electrodes/graphite_ORegan2021/parameters.csv
@@ -12,7 +12,7 @@ Negative electrode porosity,0.25,Chen 2020,
 Negative electrode active material volume fraction,0.75,Chen 2020,
 Negative particle radius [m],5.86E-6,Chen 2020,
 Negative electrode Bruggeman coefficient (electrolyte),1.5,Chen 2020,theoretical
-Negative electrode Bruggeman coefficient (electrode),1.5,default,
+Negative electrode Bruggeman coefficient (electrode),0,default,
 ,,,
 # Interfacial reactions,,,
 Negative electrode cation signed stoichiometry,-1,,
diff --git a/pybamm/input/parameters/lithium_ion/positive_electrodes/nmc_ORegan2021/parameters.csv b/pybamm/input/parameters/lithium_ion/positive_electrodes/nmc_ORegan2021/parameters.csv
index 4b23a04101..b7e8d9d14e 100644
--- a/pybamm/input/parameters/lithium_ion/positive_electrodes/nmc_ORegan2021/parameters.csv
+++ b/pybamm/input/parameters/lithium_ion/positive_electrodes/nmc_ORegan2021/parameters.csv
@@ -12,7 +12,7 @@ Positive electrode porosity,0.335,Chen 2020,
 Positive electrode active material volume fraction,0.665,Chen 2020,
 Positive particle radius [m],5.22E-6,Chen 2020,
 Positive electrode Bruggeman coefficient (electrolyte),1.5,Chen 2020,theoretical
-Positive electrode Bruggeman coefficient (electrode),1.5,default,
+Positive electrode Bruggeman coefficient (electrode),0,default,
 ,,,
 # Interfacial reactions,,,
 Positive electrode cation signed stoichiometry,-1,,