diff --git a/src/conversion/Make/files b/src/conversion/Make/files
index 4cf7b300a083c7b9af8578ec4c43bd559761bb7e..f6dda0c9c12346551a24eefe4a41b2d59827cf25 100644
--- a/src/conversion/Make/files
+++ b/src/conversion/Make/files
@@ -20,8 +20,8 @@ starcd/STARCDMeshWriter.C
 
 polyDualMesh/polyDualMesh.C
 
-vtk/output/foamVtkInternalWriter.H
-vtk/output/foamVtkPatchWriter.H
+vtk/output/foamVtkInternalWriter.C
+vtk/output/foamVtkPatchWriter.C
 vtk/output/foamVtkSurfaceFieldWriter.C
 
 LIB = $(FOAM_LIBBIN)/libconversion