diff --git a/src/lagrangian/parcel/submodels/CloudFunctionObjects/ParticleErosion/ParticleErosion.C b/src/lagrangian/parcel/submodels/CloudFunctionObjects/ParticleErosion/ParticleErosion.C
index 595f9b1038..e617150510 100644
--- a/src/lagrangian/parcel/submodels/CloudFunctionObjects/ParticleErosion/ParticleErosion.C
+++ b/src/lagrangian/parcel/submodels/CloudFunctionObjects/ParticleErosion/ParticleErosion.C
@@ -161,12 +161,12 @@ void Foam::ParticleErosion<CloudType>::preEvolve()
 
 
 template<class CloudType>
-void Foam::ParticleErosion<CloudType>::postPatch
-(
-    const parcelType& p,
-    const polyPatch& pp
-)
+void Foam::ParticleErosion<CloudType>::preFace(const parcelType& p)
 {
+    const fvMesh& mesh = this->owner().mesh();
+    if (!p.onBoundaryFace(mesh)) return;
+
+    const polyPatch& pp = mesh.boundaryMesh()[p.patch(mesh)];
     const label patchi = pp.index();
     const label localPatchi = applyToPatch(patchi);
 
diff --git a/src/lagrangian/parcel/submodels/CloudFunctionObjects/ParticleErosion/ParticleErosion.H b/src/lagrangian/parcel/submodels/CloudFunctionObjects/ParticleErosion/ParticleErosion.H
index 0ac9532f3f..17352fbc64 100644
--- a/src/lagrangian/parcel/submodels/CloudFunctionObjects/ParticleErosion/ParticleErosion.H
+++ b/src/lagrangian/parcel/submodels/CloudFunctionObjects/ParticleErosion/ParticleErosion.H
@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     | Website:  https://openfoam.org
-    \\  /    A nd           | Copyright (C) 2011-2022 OpenFOAM Foundation
+    \\  /    A nd           | Copyright (C) 2011-2023 OpenFOAM Foundation
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -169,8 +169,8 @@ public:
             //- Pre-evolve hook
             virtual void preEvolve();
 
-            //- Post-patch hook
-            virtual void postPatch(const parcelType& p, const polyPatch& pp);
+            //- Pre-face hook
+            virtual void preFace(const parcelType& p);
 };
 
 
diff --git a/src/lagrangian/parcel/submodels/CloudFunctionObjects/PatchCollisionDensity/PatchCollisionDensity.C b/src/lagrangian/parcel/submodels/CloudFunctionObjects/PatchCollisionDensity/PatchCollisionDensity.C
index c64aa32829..1e76b70e33 100644
--- a/src/lagrangian/parcel/submodels/CloudFunctionObjects/PatchCollisionDensity/PatchCollisionDensity.C
+++ b/src/lagrangian/parcel/submodels/CloudFunctionObjects/PatchCollisionDensity/PatchCollisionDensity.C
@@ -280,12 +280,12 @@ void Foam::PatchCollisionDensity<CloudType>::preEvolve()
 
 
 template<class CloudType>
-void Foam::PatchCollisionDensity<CloudType>::postPatch
-(
-    const parcelType& p,
-    const polyPatch& pp
-)
+void Foam::PatchCollisionDensity<CloudType>::preFace(const parcelType& p)
 {
+    const fvMesh& mesh = this->owner().mesh();
+    if (!p.onBoundaryFace(mesh)) return;
+
+    const polyPatch& pp = mesh.boundaryMesh()[p.patch(mesh)];
     if (pp.coupled()) return;
 
     const label patchi = pp.index();
diff --git a/src/lagrangian/parcel/submodels/CloudFunctionObjects/PatchCollisionDensity/PatchCollisionDensity.H b/src/lagrangian/parcel/submodels/CloudFunctionObjects/PatchCollisionDensity/PatchCollisionDensity.H
index b1bae4be7c..a73459311e 100644
--- a/src/lagrangian/parcel/submodels/CloudFunctionObjects/PatchCollisionDensity/PatchCollisionDensity.H
+++ b/src/lagrangian/parcel/submodels/CloudFunctionObjects/PatchCollisionDensity/PatchCollisionDensity.H
@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     | Website:  https://openfoam.org
-    \\  /    A nd           | Copyright (C) 2018-2022 OpenFOAM Foundation
+    \\  /    A nd           | Copyright (C) 2018-2023 OpenFOAM Foundation
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -135,8 +135,8 @@ public:
             //- Pre-evolve hook
             virtual void preEvolve();
 
-            //- Post-patch hook
-            virtual void postPatch(const parcelType& p, const polyPatch& pp);
+            //- Pre-face hook
+            virtual void preFace(const parcelType& p);
 };