diff --git a/Hyperbolic_triangulation_2/demo/Hyperbolic_triangulation_2/CMakeLists.txt b/Hyperbolic_triangulation_2/demo/Hyperbolic_triangulation_2/CMakeLists.txt
index f74d3a16aff..891a5b6d017 100644
--- a/Hyperbolic_triangulation_2/demo/Hyperbolic_triangulation_2/CMakeLists.txt
+++ b/Hyperbolic_triangulation_2/demo/Hyperbolic_triangulation_2/CMakeLists.txt
@@ -28,6 +28,7 @@ if(CGAL_FOUND AND CGAL_Qt5_FOUND AND Qt5_FOUND AND (CGAL_Core_FOUND OR LEDA_FOUN
   
   # cpp files
   add_executable ( HDT2 HDT2.cpp ${CGAL_Qt5_RESOURCE_FILES} ${RESOURCE_FILES} ${UIS})
+  add_to_cached_list( CGAL_EXECUTABLE_TARGETS HDT2 )
   target_link_libraries ( HDT2 CGAL::CGAL CGAL::CGAL_Qt5 CGAL::CGAL_Core Qt5::Widgets)
 else()
   message(STATUS "NOTICE: This demo requires CGAL, CGAL_Core (or LEDA), and Qt5 and will not be compiled.")
diff --git a/Periodic_4_hyperbolic_triangulation_2/demo/Periodic_4_hyperbolic_triangulation_2/CMakeLists.txt b/Periodic_4_hyperbolic_triangulation_2/demo/Periodic_4_hyperbolic_triangulation_2/CMakeLists.txt
index 663515d9ce9..5954494495f 100644
--- a/Periodic_4_hyperbolic_triangulation_2/demo/Periodic_4_hyperbolic_triangulation_2/CMakeLists.txt
+++ b/Periodic_4_hyperbolic_triangulation_2/demo/Periodic_4_hyperbolic_triangulation_2/CMakeLists.txt
@@ -39,6 +39,7 @@ if(CGAL_FOUND AND (CGAL_Core_FOUND OR LEDA_FOUND) AND Qt5_FOUND AND CGAL_Qt5_FOU
   if(LEDA_FOUND)
     target_link_libraries( P4HDT2 PRIVATE ${LEDA_LIBRARIES} )
   endif()
+  add_to_cached_list( CGAL_EXECUTABLE_TARGETS P4HDT2 )
 else()
   message(STATUS "NOTICE: This demo requires Qt5 and will not be compiled.")
 endif()