diff --git a/src/atmosphericModels/porosityModels/powerLawLopesdaCosta/powerLawLopesdaCosta.C b/src/atmosphericModels/porosityModels/powerLawLopesdaCosta/powerLawLopesdaCosta.C
index c7524fc835..15d68357d1 100644
--- a/src/atmosphericModels/porosityModels/powerLawLopesdaCosta/powerLawLopesdaCosta.C
+++ b/src/atmosphericModels/porosityModels/powerLawLopesdaCosta/powerLawLopesdaCosta.C
@@ -6,7 +6,7 @@
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
     Copyright (C) 2018 OpenFOAM Foundation
-    Copyright (C) 2020 OpenCFD Ltd.
+    Copyright (C) 2020,2022 OpenCFD Ltd.
 -------------------------------------------------------------------------------
 License
     This file is part of OpenFOAM.
@@ -57,7 +57,7 @@ Foam::porosityModels::powerLawLopesdaCostaZone::powerLawLopesdaCostaZone
 :
     zoneName_(name + ":porousZone")
 {
-    dictionary coeffs(dict.optionalSubDict(modelType + "Coeffs"));
+    const dictionary& coeffs(dict.optionalSubDict(modelType + "Coeffs"));
 
     // Vertical direction within porous region
     vector zDir(coeffs.get<vector>("zDir"));
diff --git a/src/dynamicFvMesh/dynamicRefineFvMesh/dynamicRefineFvMesh.C b/src/dynamicFvMesh/dynamicRefineFvMesh/dynamicRefineFvMesh.C
index ec38a6f59d..36002b44f8 100644
--- a/src/dynamicFvMesh/dynamicRefineFvMesh/dynamicRefineFvMesh.C
+++ b/src/dynamicFvMesh/dynamicRefineFvMesh/dynamicRefineFvMesh.C
@@ -165,7 +165,7 @@ void Foam::dynamicRefineFvMesh::calculateProtectedCells
 
 void Foam::dynamicRefineFvMesh::readDict()
 {
-    dictionary refineDict
+    const dictionary refineDict
     (
         IOdictionary
         (