diff --git a/Polyhedron/demo/Polyhedron/CMakeLists.txt b/Polyhedron/demo/Polyhedron/CMakeLists.txt
index d3e8ff9837b..ca670fb6822 100644
--- a/Polyhedron/demo/Polyhedron/CMakeLists.txt
+++ b/Polyhedron/demo/Polyhedron/CMakeLists.txt
@@ -260,6 +260,7 @@ if(CGAL_Qt5_FOUND AND Qt5_FOUND)
     # Support for precompiled headers, for Mesh_3 (since CMake 3.16)
     target_precompile_headers(scene_c3t3_item PUBLIC [["C3t3_type.h"]])
   endif()
+  add_item(scene_tetrahedra_item Scene_tetrahedra_item.cpp)
   add_item(scene_transform_item Plugins/PCA/Scene_facegraph_transform_item.cpp)
   add_item(scene_edit_box_item Plugins/PCA/Scene_edit_box_item.cpp)
   add_item(scene_image_item Scene_image_item.cpp)
diff --git a/Polyhedron/demo/Polyhedron/Plugins/Mesh_3/CMakeLists.txt b/Polyhedron/demo/Polyhedron/Plugins/Mesh_3/CMakeLists.txt
index cf8e36390c3..52e9c0d0abb 100644
--- a/Polyhedron/demo/Polyhedron/Plugins/Mesh_3/CMakeLists.txt
+++ b/Polyhedron/demo/Polyhedron/Plugins/Mesh_3/CMakeLists.txt
@@ -110,6 +110,9 @@ endif() #eigen
 polyhedron_demo_plugin(c3t3_io_plugin C3t3_io_plugin KEYWORDS Viewer Mesh_3)
 target_link_libraries(c3t3_io_plugin PUBLIC scene_c3t3_item)
 
+polyhedron_demo_plugin(tetrahedra_filtering_plugin Tetrahedra_filtering_plugin KEYWORDS Mesh_3)
+target_link_libraries(tetrahedra_filtering_plugin  PUBLIC scene_tetrahedra_item scene_c3t3_item)
+
 qt5_wrap_ui(FilterUI_FILES Filter_widget.ui)
 polyhedron_demo_plugin(mesh_3_filter_domain_plugin Mesh_3_filter_domain_plugin ${FilterUI_FILES} KEYWORDS Viewer Mesh_3)
 target_link_libraries(mesh_3_filter_domain_plugin PUBLIC scene_c3t3_item)