diff --git a/Point_set_processing_3/include/CGAL/wlop_simplify_and_regularize_point_set.h b/Point_set_processing_3/include/CGAL/wlop_simplify_and_regularize_point_set.h
index 934b5f36a17..68f11322a7b 100644
--- a/Point_set_processing_3/include/CGAL/wlop_simplify_and_regularize_point_set.h
+++ b/Point_set_processing_3/include/CGAL/wlop_simplify_and_regularize_point_set.h
@@ -583,7 +583,7 @@ wlop_simplify_and_regularize_point_set(
                            sample_points,          
                            original_kd_tree,
                            sample_kd_tree,
-                           radius, 
+                           radius2,
                            original_density_weights,
                            sample_density_weights);