diff --git a/CGAL_ipelets/demo/CGAL_ipelets/alpha_shapes.cpp b/CGAL_ipelets/demo/CGAL_ipelets/alpha_shapes.cpp
index 62a35e224da..d4b9fbaefab 100644
--- a/CGAL_ipelets/demo/CGAL_ipelets/alpha_shapes.cpp
+++ b/CGAL_ipelets/demo/CGAL_ipelets/alpha_shapes.cpp
@@ -80,7 +80,7 @@ void ASphapeIpelet::protected_run(int fn)
   );
 
 
-  if (pt_list.empty() and cir_list.empty()) {
+  if (pt_list.empty() && cir_list.empty()) {
     print_error_message("No circle nor point selected");
     return;
   }
diff --git a/CGAL_ipelets/demo/CGAL_ipelets/mesh_2.cpp b/CGAL_ipelets/demo/CGAL_ipelets/mesh_2.cpp
index 3de45eff734..03cb6df4ecd 100644
--- a/CGAL_ipelets/demo/CGAL_ipelets/mesh_2.cpp
+++ b/CGAL_ipelets/demo/CGAL_ipelets/mesh_2.cpp
@@ -77,7 +77,7 @@ void IpeletMesh2::protected_run(int fn)
       )
     );
 
-  if (pt_list.empty() and sg_list.empty() and pol_list.empty()) {
+  if (pt_list.empty() && sg_list.empty() && pol_list.empty()) {
     print_error_message("No mark selected");
     return;
   }