diff --git a/Constrained_triangulation_3/doc/Constrained_triangulation_3/PackageDescription.txt b/Constrained_triangulation_3/doc/Constrained_triangulation_3/PackageDescription.txt
index c60f7774e62..3bb1a588db1 100644
--- a/Constrained_triangulation_3/doc/Constrained_triangulation_3/PackageDescription.txt
+++ b/Constrained_triangulation_3/doc/Constrained_triangulation_3/PackageDescription.txt
@@ -1,5 +1,5 @@
 /*!
-\defgroup PkgConstrainedTriangulation3Ref 3D Constrained Triangulations Reference
+\defgroup PkgConstrainedTriangulation3Ref Reference Manual
 
 \defgroup PkgConstrainedTriangulation3Concepts Concepts
 \ingroup PkgConstrainedTriangulation3Ref
diff --git a/Constrained_triangulation_3/examples/Constrained_triangulation_3/CMakeLists.txt b/Constrained_triangulation_3/examples/Constrained_triangulation_3/CMakeLists.txt
index feab6619991..e16d3547b3d 100644
--- a/Constrained_triangulation_3/examples/Constrained_triangulation_3/CMakeLists.txt
+++ b/Constrained_triangulation_3/examples/Constrained_triangulation_3/CMakeLists.txt
@@ -3,6 +3,9 @@ project(Constrained_triangulation_3_Examples)
 
 find_package(CGAL REQUIRED COMPONENTS Qt6)
 
+find_package(Eigen3 QUIET)
+include(CGAL_Eigen3_support)
+
 add_compile_definitions(QT_NO_KEYWORDS)
 
 create_single_source_cgal_program(conforming_constrained_Delaunay_triangulation_3.cpp)
@@ -12,9 +15,13 @@ create_single_source_cgal_program(ccdt_3_from_soup_fpmap.cpp)
 create_single_source_cgal_program(ccdt_3_after_autorefinement.cpp)
 create_single_source_cgal_program(ccdt_3_preprocessing.cpp)
 create_single_source_cgal_program(ccdt_3_check_preconditions.cpp)
-create_single_source_cgal_program(ccdt_3_fpmap_region_growing)
 create_single_source_cgal_program(remesh_constrained_Delaunay_triangulation_3.cpp)
 
+if(TARGET CGAL::Eigen3_support)
+  create_single_source_cgal_program(ccdt_3_fpmap_region_growing.cpp)
+  target_link_libraries(ccdt_3_fpmap_region_growing PUBLIC CGAL::Eigen3_support)
+endif()
+
 if(CGAL_Qt6_FOUND)
   target_link_libraries(conforming_constrained_Delaunay_triangulation_3 PUBLIC CGAL::CGAL_Basic_viewer)
   target_link_libraries(conforming_constrained_Delaunay_triangulation_3_from_soup PUBLIC CGAL::CGAL_Basic_viewer)
diff --git a/Constrained_triangulation_3/examples/Constrained_triangulation_3/ccdt_3_fpmap_region_growing.cpp b/Constrained_triangulation_3/examples/Constrained_triangulation_3/ccdt_3_fpmap_region_growing.cpp
index af604d87d23..caee9835d43 100644
--- a/Constrained_triangulation_3/examples/Constrained_triangulation_3/ccdt_3_fpmap_region_growing.cpp
+++ b/Constrained_triangulation_3/examples/Constrained_triangulation_3/ccdt_3_fpmap_region_growing.cpp
@@ -65,3 +65,4 @@ int main(int argc, char* argv[])
 
   return EXIT_SUCCESS;
 }
+