diff --git a/CMakeLists_files.cmake b/CMakeLists_files.cmake
index b60b8116c..99ceda1d8 100644
--- a/CMakeLists_files.cmake
+++ b/CMakeLists_files.cmake
@@ -658,7 +658,7 @@ list (APPEND PUBLIC_HEADER_FILES
   opm/models/io/vtkblackoilmicpparams.hpp
   opm/models/io/vtkblackoilmodule.hpp
   opm/models/io/vtkblackoilparams.hpp
-  opm/models/io/vtkblackoilpolymermodule.hh
+  opm/models/io/vtkblackoilpolymermodule.hpp
   opm/models/io/vtkblackoilsolventmodule.hh
   opm/models/io/vtkcompositionmodule.hh
   opm/models/io/vtkdiffusionmodule.hh
diff --git a/opm/models/blackoil/blackoilpolymermodules.hh b/opm/models/blackoil/blackoilpolymermodules.hh
index bf21eb4f8..7ebd31acf 100644
--- a/opm/models/blackoil/blackoilpolymermodules.hh
+++ b/opm/models/blackoil/blackoilpolymermodules.hh
@@ -35,7 +35,7 @@
 #include <opm/models/blackoil/blackoilpolymerparams.hpp>
 #include <opm/models/blackoil/blackoilproperties.hh>
 
-#include <opm/models/io/vtkblackoilpolymermodule.hh>
+#include <opm/models/io/vtkblackoilpolymermodule.hpp>
 
 #include <opm/models/utils/propertysystem.hh>
 
diff --git a/opm/models/io/vtkblackoilpolymermodule.hh b/opm/models/io/vtkblackoilpolymermodule.hpp
similarity index 98%
rename from opm/models/io/vtkblackoilpolymermodule.hh
rename to opm/models/io/vtkblackoilpolymermodule.hpp
index 0f012069b..ab23d7f2a 100644
--- a/opm/models/io/vtkblackoilpolymermodule.hh
+++ b/opm/models/io/vtkblackoilpolymermodule.hpp
@@ -24,8 +24,8 @@
  * \file
  * \copydoc Opm::VtkBlackOilPolymerModule
  */
-#ifndef EWOMS_VTK_BLACK_OIL_POLYMER_MODULE_HH
-#define EWOMS_VTK_BLACK_OIL_POLYMER_MODULE_HH
+#ifndef OPM_VTK_BLACK_OIL_POLYMER_MODULE_HPP
+#define OPM_VTK_BLACK_OIL_POLYMER_MODULE_HPP
 
 #include <dune/common/fvector.hh>
 
@@ -61,6 +61,7 @@ struct VtkWritePolymerAdsorption { static constexpr bool value = true; };
 } // namespace Opm::Parameters
 
 namespace Opm {
+
 /*!
  * \ingroup Vtk
  *
@@ -263,6 +264,7 @@ private:
     ScalarBuffer polymerViscosityCorrection_;
     ScalarBuffer waterViscosityCorrection_;
 };
+
 } // namespace Opm
 
-#endif
+#endif // OPM_VTK_BLACK_OIL_POLYMER_MODULE_HPP