diff --git a/src/OpenFOAM/matrices/LduMatrix/LduMatrix/LduMatrixATmul.C b/src/OpenFOAM/matrices/LduMatrix/LduMatrix/LduMatrixATmul.C
index 565068d4d9..50cbf806b2 100644
--- a/src/OpenFOAM/matrices/LduMatrix/LduMatrix/LduMatrixATmul.C
+++ b/src/OpenFOAM/matrices/LduMatrix/LduMatrix/LduMatrixATmul.C
@@ -28,36 +28,6 @@ License
 
 #include "LduMatrix.H"
 
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-namespace Foam
-{
-
-template<class Type, class LUType>
-class Amultiplier
-:
-    public LduInterfaceField<Type>::Amultiplier
-{
-    const Field<LUType>& A_;
-
-public:
-
-    Amultiplier(const Field<LUType>& A)
-    :
-        A_(A)
-    {}
-
-    virtual ~Amultiplier() = default;
-
-    virtual void addAmul(Field<Type>& Apsi, const Field<Type>& psi) const
-    {
-        Apsi += A_*psi;
-    }
-};
-
-}
-
-
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
 template<class Type, class DType, class LUType>
diff --git a/src/OpenFOAM/matrices/LduMatrix/LduMatrix/LduMatrixUpdateMatrixInterfaces.C b/src/OpenFOAM/matrices/LduMatrix/LduMatrix/LduMatrixUpdateMatrixInterfaces.C
index 0b63849d53..1e36a82086 100644
--- a/src/OpenFOAM/matrices/LduMatrix/LduMatrix/LduMatrixUpdateMatrixInterfaces.C
+++ b/src/OpenFOAM/matrices/LduMatrix/LduMatrix/LduMatrixUpdateMatrixInterfaces.C
@@ -60,7 +60,6 @@ void Foam::LduMatrix<Type, DType, LUType>::initMatrixInterfaces
                     interfacei,
                     psiif,
                     interfaceCoeffs[interfacei],
-                    //Amultiplier<Type, LUType>(interfaceCoeffs[interfacei]),
                     commsType
                 );
             }
@@ -89,7 +88,6 @@ void Foam::LduMatrix<Type, DType, LUType>::initMatrixInterfaces
                     interfacei,
                     psiif,
                     interfaceCoeffs[interfacei],
-                    //Amultiplier<Type, LUType>(interfaceCoeffs[interfacei]),
                     UPstream::commsTypes::blocking
                 );
             }
@@ -141,7 +139,6 @@ void Foam::LduMatrix<Type, DType, LUType>::updateMatrixInterfaces
                     interfacei,
                     psiif,
                     interfaceCoeffs[interfacei],
-                    //Amultiplier<Type, LUType>(interfaceCoeffs[interfacei]),
                     commsType
                 );
             }
@@ -168,7 +165,6 @@ void Foam::LduMatrix<Type, DType, LUType>::updateMatrixInterfaces
                         interfacei,
                         psiif,
                         interfaceCoeffs[interfacei],
-                      //Amultiplier<Type, LUType>(interfaceCoeffs[interfacei]),
                         commsType
                     );
                 }
@@ -182,7 +178,6 @@ void Foam::LduMatrix<Type, DType, LUType>::updateMatrixInterfaces
                         interfacei,
                         psiif,
                         interfaceCoeffs[interfacei],
-                      //Amultiplier<Type, LUType>(interfaceCoeffs[interfacei]),
                         commsType
                     );
                 }
@@ -208,8 +203,7 @@ void Foam::LduMatrix<Type, DType, LUType>::updateMatrixInterfaces
                     interfacei,
                     psiif,
                     interfaceCoeffs[interfacei],
-                    //Amultiplier<Type, LUType>(interfaceCoeffs[interfacei]),
-                    Pstream::commsTypes::blocking
+                    UPstream::commsTypes::blocking
                 );
             }
         }