diff --git a/Polyhedron/demo/Polyhedron/CMakeLists.txt b/Polyhedron/demo/Polyhedron/CMakeLists.txt
index 063ebfff2ae..0434cf081dd 100644
--- a/Polyhedron/demo/Polyhedron/CMakeLists.txt
+++ b/Polyhedron/demo/Polyhedron/CMakeLists.txt
@@ -509,7 +509,7 @@ if(CGAL_Qt5_FOUND AND Qt5_FOUND AND OPENGL_FOUND AND QGLVIEWER_FOUND)
   polyhedron_demo_plugin(example_plugin Polyhedron_demo_example_plugin ${exampleUI_FILES} ${example_dockUI_FILES})
   target_link_libraries(example_plugin scene_polyhedron_item)
 
-  find_package(VTK QUIET COMPONENTS
+  find_package(VTK QUIET 6.0 COMPONENTS
                          vtkCommonCore vtkIOCore vtkIOLegacy vtkIOXML)
   if (VTK_FOUND)
     include(${VTK_USE_FILE})
@@ -521,7 +521,7 @@ if(CGAL_Qt5_FOUND AND Qt5_FOUND AND OPENGL_FOUND AND QGLVIEWER_FOUND)
       message(STATUS "NOTICE : the vtk IO plugin needs VTK libraries and will not be compiled.")
     endif()
   else()
-    message(STATUS "NOTICE : the vtk IO plugin needs VTK and will not be compiled.")
+    message(STATUS "NOTICE : the vtk IO plugin needs VTK 6.0 or greater and will not be compiled.")
   endif()
 #
 # Exporting
diff --git a/Surface_mesher/demo/Surface_mesher/CMakeLists.txt b/Surface_mesher/demo/Surface_mesher/CMakeLists.txt
index bbe25d1e864..094be2bdeeb 100644
--- a/Surface_mesher/demo/Surface_mesher/CMakeLists.txt
+++ b/Surface_mesher/demo/Surface_mesher/CMakeLists.txt
@@ -97,7 +97,7 @@ if ( CGAL_FOUND AND CGAL_Qt5_FOUND AND CGAL_ImageIO_FOUND)
     add_to_cached_list( CGAL_EXECUTABLE_TARGETS ${prj} )
     
     
-    find_package(VTK 6.0 COMPONENTS
+    find_package(VTK QUIET 6.0 COMPONENTS
       vtkImagingCore
       )
     if(VTK_FOUND)