diff --git a/src/finiteVolume/fields/fvPatchFields/derived/turbulentDFSEMInlet/turbulentDFSEMInletFvPatchVectorField.C b/src/finiteVolume/fields/fvPatchFields/derived/turbulentDFSEMInlet/turbulentDFSEMInletFvPatchVectorField.C
index 20dfcaa0f705b9334b75bec581f25594548718e0..80fc93877fc855add5d902f6e1368fc8a3a92316 100644
--- a/src/finiteVolume/fields/fvPatchFields/derived/turbulentDFSEMInlet/turbulentDFSEMInletFvPatchVectorField.C
+++ b/src/finiteVolume/fields/fvPatchFields/derived/turbulentDFSEMInlet/turbulentDFSEMInletFvPatchVectorField.C
@@ -28,7 +28,6 @@ License
 #include "addToRunTimeSelectionTable.H"
 #include "fvPatchFieldMapper.H"
 #include "momentOfInertia.H"
-#include "cartesianCS.H"
 #include "Fstream.H"
 #include "globalIndex.H"
 
diff --git a/src/finiteVolume/fields/fvPatchFields/derived/turbulentDFSEMInlet/turbulentDFSEMInletFvPatchVectorField.H b/src/finiteVolume/fields/fvPatchFields/derived/turbulentDFSEMInlet/turbulentDFSEMInletFvPatchVectorField.H
index b86a6fe3e3bf0a2deadfb97881f10ec5eae446ee..2903f2002b8a8f4d9c7212fcdc31e735ce2e0274 100644
--- a/src/finiteVolume/fields/fvPatchFields/derived/turbulentDFSEMInlet/turbulentDFSEMInletFvPatchVectorField.H
+++ b/src/finiteVolume/fields/fvPatchFields/derived/turbulentDFSEMInlet/turbulentDFSEMInletFvPatchVectorField.H
@@ -91,7 +91,6 @@ SourceFiles
 namespace Foam
 {
 
-class cartesianCS;
 class pointToPointPlanarInterpolation;
 
 /*---------------------------------------------------------------------------*\