diff --git a/Arrangement_on_surface_2/demo/Arrangement_on_surface_2/CMakeLists.txt b/Arrangement_on_surface_2/demo/Arrangement_on_surface_2/CMakeLists.txt
index 9a6c1d8f2d7..04c88facf76 100644
--- a/Arrangement_on_surface_2/demo/Arrangement_on_surface_2/CMakeLists.txt
+++ b/Arrangement_on_surface_2/demo/Arrangement_on_surface_2/CMakeLists.txt
@@ -67,13 +67,15 @@ if ( CGAL_FOUND AND CGAL_Qt5_FOUND AND Qt5_FOUND)
    ${arrangement_2_uis}
    ${arrangement_2_resources}
   )
-qt5_use_modules(arrangement_2 Widgets Script)
+  qt5_use_modules(arrangement_2 Widgets Script)
   target_link_libraries( arrangement_2
     ${CGAL_LIBRARIES}
     ${CGAL_3RD_PARTY_LIBRARIES}
     ${QT_LIBRARIES}
   )
 
+  add_to_cached_list( CGAL_EXECUTABLE_TARGETS arrangement_2 )
+
 else()
 
   message(STATUS "NOTICE: This demo requires CGAL and Qt5, and will not be compiled.")
diff --git a/Polyline_simplification_2/demo/Polyline_simplification_2/CMakeLists.txt b/Polyline_simplification_2/demo/Polyline_simplification_2/CMakeLists.txt
index 6d302f3550e..0756a47f248 100644
--- a/Polyline_simplification_2/demo/Polyline_simplification_2/CMakeLists.txt
+++ b/Polyline_simplification_2/demo/Polyline_simplification_2/CMakeLists.txt
@@ -43,6 +43,8 @@ target_link_libraries( Polyline_simplification_2 ${QT_LIBRARIES} )
 # Link with CGAL
 target_link_libraries( Polyline_simplification_2 ${CGAL_LIBRARIES}  ${CGAL_3RD_PARTY_LIBRARIES})
 
+add_to_cached_list( CGAL_EXECUTABLE_TARGETS Polyline_simplification_2 )
+
 else()
 
   message(STATUS "NOTICE: This demo requires CGAL and Qt5, and will not be compiled.")