diff --git a/src/optimisation/adjointOptimisation/adjoint/global/boundaryFieldsFwd.H b/src/optimisation/adjointOptimisation/adjoint/global/boundaryFieldsFwd.H
index 4a4292e4e1834700d1e7f8676b057a6839dd40af..0b1feeb72fc7f1fbed94dcd454eb9cbd8ea58ad1 100644
--- a/src/optimisation/adjointOptimisation/adjoint/global/boundaryFieldsFwd.H
+++ b/src/optimisation/adjointOptimisation/adjoint/global/boundaryFieldsFwd.H
@@ -50,13 +50,13 @@ namespace Foam
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
-//volFields
+//- volFields
 typedef typename volScalarField::Boundary boundaryScalarField;
 typedef typename volVectorField::Boundary boundaryVectorField;
 typedef typename volTensorField::Boundary boundaryTensorField;
 
-//pointFields - actually a plain list of fields with dimension equal to the
-// number of points per patch
+//- pointFields - actually a plain list of fields with dimension equal to the
+//- number of points per patch
 typedef List<Field<scalar>> pointBoundaryScalarField;
 typedef List<Field<vector>> pointBoundaryVectorField;
 typedef List<Field<tensor>> pointBoundaryTensorField;
diff --git a/src/optimisation/adjointOptimisation/adjoint/global/createZeroField.H b/src/optimisation/adjointOptimisation/adjoint/global/createZeroField.H
index 93035d286f49396320498a04c05999ea0063c71e..8f9d7734563aaebb3ed4b8a866994e4b8fe8557f 100644
--- a/src/optimisation/adjointOptimisation/adjoint/global/createZeroField.H
+++ b/src/optimisation/adjointOptimisation/adjoint/global/createZeroField.H
@@ -89,7 +89,7 @@ createZeroBoundaryPtr
         Boundary;
 
     // Make sure that the patchFields to be generated will be of type
-    // calculated, even if they are of constraint type
+    // calculated, even if they are of constraint type.
     // Necessary to avoid unexpected behaviour when computing sensitivities
     // on symmetry patches (not a good practice either way)
     const fvBoundaryMesh& bm = mesh.boundary();
@@ -113,7 +113,7 @@ createZeroBoundaryPtr
         new Boundary
         (
             mesh.boundary(),
-            mesh.V()*pTraits<Type>::zero,  // Dummy internal field,
+            DimensionedField<Type, volMesh>::null(),
             wordList(bm.size(), fvPatchFieldBase::calculatedType()),
             actualPatchTypes
         )